Just one last note.

These days, people are gamin using 120, 144, 240 etc framerate monitors

These should all work now. 240 will have to be manually typed in. They sure render so slow though.

I used the latest appimage that was posted for 'cin_for_newer_distros.AppImage' on Ubuntu 21.04

I've not had a chance to test on my older Ubuntu's yet.

I did not create an AppImage for the older distros yet but there should be a new official release on June 30.

There is no version number, or gpg. The file has sha256sum: 09ee29682f5b427081d04f02e7565d2a59b20524a6139c81161d483f3838c9c9

I suppose I should start updating the sha256sum, but I still have a lot to learn to try to keep up.