Thanks a lot for the bug report, just released a hotfix which fixes: transition and backwards compatability bugs. Haven't touched folder repopulation yet cus that task is a little bigger. But let me know if there are any other issues.
Thanks for your answer. Replacing the transition now works properly.
Unfortunately the backwards compatability does not. I did some digging and figured out that the issue is related to refreshing the busts. (which is my eternal bane, because this is the third bug I encountered related to it.) The editor does not add the "refresh":true/false line for old saves which in turn gives a nil value for the .DATA files. Clicking on all the refresh checkboxes (including the first one that can't be unchecked) fixes this issue. Then I can uncheck whichever I don't need.
Another bug I found is concerning fractional numbers. If I add any, like 0.5, this error occurs:
It happened with with the custom colors and graphics offset for custom objects, but I imagine it happens with everything that allows floating numbers. The level you included in the download also has this problem due to it using custom colors, which I assume worked for you properly.
It seems to me this is some kind of localization issue, as my language (including my OS language) is using commas instead of dots for fractions. Interestingly changing the values (eg. from 0.5 to 0,5) in the .DATA files actually fixes this issue. At least until I save in the editor again.
(As a side note the .DATA files sometimes not actually have the same fraction I added in the editor just a really close one. for example 0.30 in the editor becomes 0.30000001192093 in the .DATA file. It doesn't seem to affect the game in any noticeable way, but I thought you should know.)