thats quite a jump to 5.0.
The 3.6 was internally named "version 4" but I decided to stick to the 3 at that time. IMatch 5 is really a completely new generation with many additions, a complete re-design of the user interface, up-to-date feature set etc.
Users of IMatch 3.6 will still find their way around quickly because the general principles (Database View, Category View, ...) are also part of the UI concept of IMatch 5.
There were about 20 updates to the 3.6 version. I only change the last number in the version number usually. If I would be a marketing-driven big money vendor, IMatch would already be at version 10