[shittyadmin]

Some quick RE work:

sqlite_rekey_v2 is at 00CA1C13 on the Windows version of 1.19.3

Hooking it with Frida or similar should allow you to drop the 3rd parameter and set pKey to NULL allowing you to create a database which can be read by standard sqlite.

Keys however appear to be account-specific - I haven't looked into the full algorithm yet, but it's fairly pointless as you'd need a copy of sqlite3 with SEE support (which costs $2600 or so) to decrypt it using that method anyways, I tried briefly but was unable to come across a stray copy of sqlite3 with SEE enabled, the above solution is probably better for now anyways.