IMSL Software


Register online

Register by mail

Register by telephone or fax

Registrar no Brasil



Payment Options

Help with Registration

Registration Services

Credit Card Security


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Quick Online Registration

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It costs $14.98 to register XLink/Win online. You will require a valid credit card or Paypal account and an email address to receive your registration (see below for other payment options). To register your copy of XLink/Win online right now and receive your registration number immediately by email, click the Buy Now button above. This will take you directly to the FastSpring secure order page.

Information on credit card security and and our privacy policy

Frequently-Asked Questions

How much?
It costs $14.98 to register a new copy of XLink/Win online. There is a reduced price for upgrading from a previous version of XLink/Win or CASIF/Win (see Upgrades). You do not not need to purchase any other download insurance or backup services, as your purchase already includes these services from IMSL Software.

How do I pay?
You can pay with any standard credit card, either online or by telephone or fax, using our online registration service. You can also mail a check or money order, or pay online via Paypal. Business customers can arrange credit terms for purchase orders. There are some other options for International customers not paying by credit card - please contact IMSL Software if you don't find a suitable option listed on this page.

Is it secure to pay by credit card online?
It is as secure as using your credit card anywhere else, by telephone or in person. Click here for more information about credit card security. If you aren't comfortable using your credit card online, you are welcome to call the toll-free ordering number or send a check (see Payment Options).

What do I receive?
You receive a registration number by email along with your order confirmation. The registration number automatically registers the program when you enter it and removes all the demo version restrictions. IMSL Software will send you a follow-up email with information on how to access the additional online resources available only to registered users.

What if I'm ordering as a gift for someone else?
If you want the registration to appear in someone else's name, just select this option when ordering, or else send an email to IMSL Software after placing your order to request that a different name appear on the registration. If you want to send the recipient an electronic or paper notification of your gift, please let us know.

How long does it take?
When you register online by credit card, you will normally receive your registration number along with the order confirmation within a few minutes. If you mail a check, or if your credit card requires manual validation for some reason, it may take longer for your order to be processed. Please read further on this page if you want more information.

Why should I register?
Registration will remove the restrictions and registration reminders from the program. As a registered user you will receive free technical support, and access to free accessory files and utilities and pre-release information from the registered users web site.

Your small registration fee supports our ongoing development and helps to keep the price of the software reasonable. You can try the demo version of the program before you register so that you can be sure that it meets your needs. If you find the program useful, and you want to see it supported and upgraded in future, then please take a few moments to register your copy.

Can I upgrade from an older version?
Product upgrades are free for one year or until the next major release, whichever is later. Any previously registered version of XLink/Win or CASIF/Win can be upgraded at a reduced price. Follow the UPGRADE ordering links below.

If you have any other questions about registration, please don't hesitate to ask IMSL Software.

Statistics: where registrations come from, and what organizer models people are using.

Register Online

XLink/Win can be registered online with your Visa, MasterCard, American Express, or Discover credit card, or using Paypal. The registration fee is $14.98 for new users, or $9.98 for upgrades (U.S. dollars). You can register online with our online registration service FastSpring, which provides your registration number in a few minutes by return email if you are paying by credit card.

Register XLink/Win online with FastSpring: NEW REGISTRATION or UPGRADE

How to register: When you register online with FastSpring, you will be asked to enter your name, address, and credit card information (or other payment type) on the secure order form. In the order quantity fields enter the number of new or upgrade licenses you want. If you do not want to enter your credit card information online, you can telephone FastSpring, or send it to them by fax or letter. Upgrades are available only to previously-registered users of CASIF/Win or XLink/Win who already have a registration number. Please provide the optional information requested about your organizer and cable type if possible to assist in providing you with up to date information and technical support. If the credit card charge can be processed automatically, you will receive your registration number immediately in the order confirmation message. Please check the credit card information you enter carefully, as orders which are invalid for any reason may be held up for verification or automatically rejected. More information on credit card security and anti-fraud measures. The registration service will notify IMSL Software of your registration as soon as your order is confirmed, and you will receive your official registration message with additional information from IMSL Software by Email, usually within a few hours.

If you want to register an older version of CASIF/Win, just register XLink/Win and add a note that you want a registration number for CASIF/Win.

FastSpring Company Information and Order Enquiries

If you want to pay IMSL Software directly via Paypal, please send an email to for the information you will need.

Register by Mail

You can pay by mailing a check or money order for $14.98 to FastSpring (USA).

FastSpring requires orders to be placed online. You can specify the method of payment as check or money order to receive mailing information and additional instructions. FastSpring order form.

Normally you will receive your registration number by Email, so please include your email address.

For registrations sent by postal mail, you can receive your registration number promptly by Email if you send notice to IMSL Software that you have mailed your check. We ask only that you request your registration number AFTER you have mailed your check.   A copy of the program on is available on CD by special request if you are unable to download it from the web site or receive it by Email.

Payment Options

You can register XLink/Win or CASIF/Win most easily by paying online with a credit card or Paypal. You can also pay by mailing a check. If you don't find a suitable option here, you can contact IMSL Software for country-specific information on other payment options.

Company Purchase Orders:Our registration service FastSpring will accept Purchase Orders from companies with qualifying credit. You can contact them by telephone or fax to arrange credit if your company is not already one of their pre-qualified customers. IMSL Software does not accept P.O.s directly.

No Brasil temos outras opc§es para registrar, ou envie uma mensagem para

Help with Registration

Registration number doesn't work
Make sure that you are entering your name exactly as shown in the registration. Check that you have the latest version of XLink/Win. Make sure that you are not trying to use a registration number for the 16-bit version of XLink/Win with the 32-bit version or vice-versa. See the Technical Support page for more information.

Don't have a credit card
See Payment Options for alternatives.

Delay processing order
If you ordered from FastSpring, please contact them directly to ask about the delay. IMSL Software is not involved in processing payments and probably hasn't received notification of your order yet.

Other problems: ask . We will respond promptly to all questions.

Online Registration Service

FastSpring Company Information and Order Enquiries

Register XLink/Win online with FastSpring: NEW REGISTRATION or UPGRADE

All orders via FastSpring must be placed online. Order form supports selection of currency and language by country. Enquiries regarding orders can be made online or via email. FastSpring generally responds quickly, within 2 hours.

FastSpring accepts payment via Visa, Mastercard«, American Express«, Discover«, PayPal™, check, money order, or purchase order. Payments are accepted in five major currencies in addition to the US Dollar.

Credit Card Security

Security on the Internet: All credit-card registrations via FastSpring use secure encryption between the web site and your browser, and should be considered as secure as telephone or in-person credit card transactions. We do not recommend emailing credit card information, as email is not as secure. If you must use email, then always split your card number and expiry date between two separate emails. Credit card registrations are processed only by FastSpring, not directly by IMSL Software, so please do not email credit card information to IMSL Software.

If you have any concerns about using your credit card on the Internet, you can place your order by telephone or fax.

Anti-fraud measures: Credit card registrations are accepted from any country, but all credit card transactions are subject to rigorous validity and anti-fraud checking. If your credit card registration is rejected for any reason, please verify carefully the information you entered. Credit card charges can normally be processed immediately, but in some cases they may be delayed for 24 hours or more for verification. If your credit card order is rejected or delayed for reasons which you do not understand, then please contact the credit card processor (FastSpring) for an explanation.

Privacy Policy: IMSL Software does not receive or store any credit card information. Your basic registration information is stored for future reference in case you ever lose it and need a copy, or in case you want to upgrade. Any information you may provide is used solely by IMSL Software to assist you, and is never published or disclosed to other parties except as part of an anonymous statistical aggregate. IMSL Software will not send you any unsolicited email or share your email address with other parties.

Where do registrations come from?

What organizer models do XLink/Win users have?