Hi,
The GUI is 32 bits, it first tries to start dgate64.exe and if that fails is starts dgate.exe. So updating the executables should be all there is to it. And indeed the database driver should be 64 bits. This means for dbaseIII and sqlite no change, because it is compiled in, ODBC depends on drivers installed in windows, anmd mysql and postgres need other driver DLL's.
If the GUI cannot access the datbase anymore (it will still need 32 bits drivers), you can set BrowseThroughDBF to 1, this will make the GUI communicate with dgate through built in DBF drivers, no longer relying on having its own database access.
Regards,
Marcel