Hi,

I you want to have fully functional MapSource version and to use it with older 6.15.7 program version, only correct way is as suggested by Ballebar:

1. Install MapSource version from post #5 (catymag)
2. Reverse convert with [Only registered and activated users can see links. ]
3. Uninstall original MapSource map version (Control panel)
4. Uninstall only MapSource program (this new version)
5. Install MapSource 6.15.7 from this post:
[Only registered and activated users can see links. ]
6. Optionally overwrite MapSource.exe with [Only registered and activated users can see links. ]

Now you could use fully functional map with MapSource 6.15.7, and have no further problems