This should be fixed in 6.1.4. Please download the new version and see if it works.
It's fixed, thank you very much :) My characters are back, even if at level 1. Some have 7 hours of playtime (as old as 4.0 over there), was more bummed about missing them than their exp, which can be farmed again. I reported in a previous comment days ago the "invisible" color missing from the palette, but now it's also working again as intended. Excited to try out the combo of news saying what the levels actually drop and the reduced prices in the boost shop.
On a unrelated note, may I ask you if you're planning to also add new clothes in the future?
Understood, thank you. Yes, some new designs would be great, would be something to look forward to unlock :) I have a smaller request, actually. Is it possible to add a zoom feature to the photo mode? It would be nice to be able to include the entire doll's body or parts of them in their picture without having to use weird angles.