Is it possible to save the current project to resume it someday?

[Misha]

Halfway through editing, the program crashes or BSOD or you want to take a break from work, but you can't save your work progress, and it's just so frustrating to have to finish your work in one sitting!

[eumagga0x2a]

but you can't save your work progress

Except for interrupting an ongoing encoding, you can always save the current state of editing (as a snapshot, not the history of editing steps): File --> Project Script --> Save As Project. If you simply close Avidemux, you can later continue from where you were (except for seeking to the last position in the video) by "Recent" --> "Restore previous session".

In case of a BSOD, nothing can be done, obviously.