The only significant change in this version update is the migration of local data from IndexedDB to SQLite. This migration is intended to provide more stable and reliable storage of local data, in addition to giving users a more open format for inspecting and querying their data locally.
Note that this update is non-destructive in that it simple copies the contents of the old database to a new one. If you experience any issues with the migration you can always revert back to the previous version to access your data from the original database.
If the migration was successful and you would like to free up disk space by deleting the old database, you can simple delete the IndexedDB folder in you application data directory. If you are using the free / offline version of Mochi without syncing, please remember to make a backup copy first, just in case.