Hi and welcome.
You have the following options:
- try to recover the missing files from your Dropbox recycle bin.
- try to recover the files from the cryptomator backup. If theres a backup (which is created every time you have a successful login), you’ll find files named like “masterkey.cryptomator.ABCD1234.bkup” and "vault.cryptomator.ABCD1234.bkup. If you rename these files to its original name you can restore the files.
- try to recover from your personal backup
- try to create new files based on your recovery key. please look here fore instructions: Recover masterkey file with recovery key? - #4 by tobihagemann
At the end you should also check if you can find any information what caused this renaming and deleting of the files. Cryptomator does’nt do that, so typically theres some malfunktion in backup or sync processes.