Hi @TakiKio , in the meantime till someone form the CryptPad team answers your thread:
1) Migration
Personally I would also try the "new install / migration" way, since Version 3.4 is really old. The new install way will supposedly work better / easier / faster. Your question is important, since there is little information so far regardign backups and (!) restore.
Did you already begin the new install? According to the doc it could be as easy as copying 4 directories to the new server, but I doubt this will work on first try. Anyway, I would suggest to try this and post problems regarding this in the forum, so
a) you can solve your problem (as explained, I doubt the update way will work soon)
b) users can find information or experience regarding restore
See:
I guess you already read the first link since you wrote you moved soem directories, but I'm sorry, there is to less information online regarding restore ...
2) Zip File
Could you please give some detail? What would this solve. Sorry, if I can't see it on the first try. Please notice that CryptPad dropped bower:
I'm sorry, that I'm of little help. I'm just trying to push this thread a bit, so it will get solved and so all users benefit from informations regarding restore or migration. Sooner or later restore and migration are a topic for every CryptPad server.