I think you just have to delete its registry and application settings folder and the countdown will restart. Unlike sai,this one doesnt store that info in files.
Already tried.
At last, I can found how 4th paint set "save" / "not save" flag:
1) I download latest program version
2) Run it, create new file and save it. Successfully.
3) I set July on calendar.
4) Run program, create new file -> Can't save.
5) I restore clock (to April)
6) Run it, create new file and save it. Successfully.
So every 4th paint version work for specified period of time, for example 0.9.76 work from March 20 to April 15 (I don't know for sure, just proposal)
IMO if you release its translation,more people will be interested in cracking it
I will release translation at next week. Just want to fix some strings.