Hi!
Main story:
2.5 - well known release of QuickShow.
2.6 - changed a way how QS keep the frames in memory and in files. The method if very optimized and save ~ 50% of size. Depends on the frame itself. Also, improved memory management.
2.7 - added support of FB4 hardware.
Build 2.7 will be available for download in nearest time.
Regards,
Alexey