Errors on changing database

I have had a fully working Project based on MySQL.
Did the backup and then I changed a database for this project to SQLite.
Generated new DICTIONARY and run Epress Updater to change connection string in every App.

Unfortunately the first App in the project crashes with an error:

An error occurred while connecting to the database:
Access denied for user ‘klon56_sqa56’@‘107-213-88-91.lightspeed.cicril.sbcglobal.net’ (using password: YES)

tryin to connect to the old MySQL instead SQLite (hosted locally).
All Apps show ine SQLite connection in properties, but seems like the code still holds the old connection string.
I tried to generate the source several times but it did not help.

Any ideas ?

Arthur