If you purchased SliQ Invoicing some time ago and you have recently downloaded a copy from our site you may find that your existing unlock code does not work. The most likely reason for this is that a major version upgrade has taken place. When you purchase, you are entitled to a free upgrade to any minor version number change, e.g. if you purchased 2.1 you would be entitled to a free upgrade to 2.3, 2.3 and so on. However, if you wanted to use a major version change, e.g. 4.0, you will need to purchase an upgrade on our sales page.

If you try to register V6 with an unlock code for V5 for example, you will get a message indicating that no payment can be found and the registration will fail.

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Frequently Asked Questions