The Meaning of Life, the Universe, and Everything.
Have you considered adding other "lounge" games to this? Along the lines of Checkers or dice? Chinese Checkers or Dominoes would be AWESOME. Just simple stuff we can use to make a tavern more interesting
Also, I notice the sign-editor item is not available in 1.7 - that's correct right? It's not needed, but I think it would be super useful.
Saying shortly full mod rework, significant changes, improvements. (you can see how mush work was done in repository history).
Bad news for you that there is no backward compatibility at all. New versions (2+) has even different mod ID ('paniclecraft' vs old 'ee_man-mod3'), but because of different mod ids you can install then both.
How many paintings (and another mod elements) you have in your world?
I can write you an instruction (for old 18.104.22.168 version) how manually (using nbtedit mod) export pictures from your ingame painting to png.
New version support import via gui by '/paniclecraft painting editview' command.