To manually wipe the XPressEntry handheld database do the following
Exit XPressEntry
My Device(or on Windows Mobile, Start Menu -> File Explorer)
Go to the \Flash Disk\XPressEntry\ directory
Find the xpdb_hh.db3 file(note that by default it will not show the .db3). There might be a .journal file also.
Delete this file and restart XPressEntry handheld.