John on Unexpected error When I open ezdrummer???

Hi,
please try the following:
you need to remove some files in the 'AppData\Roaming\' folder. This is a hidden folder but you can open the Windows Explorer and type in 'C:\Users\yourComputerUserNameHere\AppData' to access it, or click Start > Computer > Hold ALT + T to get the tools menu open > Folder Options > View > Enable "Show hidden files, folders and drives" and Untick "Hide protected operating system files". I would prefer the first way myself.
Then please remove the following files:
MidiDB, MidiDB_fav, MidiDB-shm, MidiDB-wal (if they exist) from
"C:/Users/"CurrentUser"/AppData/Roaming/Toontrack/EZdrummer"
and
"C:/Users/"CurrentUser"/AppData/Roaming/Toontrack/EZdrummer/OnlineMIDI"
BR,
John