https://bugs.winehq.org/show_bug.cgi?id=52667
--- Comment #12 from Scott shagooserver@gmail.com --- As I said in my previous post I changed the wine prefix to no theme. I then restarted my PC and opened DTS in the normal way through my quick launcher and then via the terminal. Both results were the same- not able to select or type in a save location.
For info, clicking the "Save To" button should bring up a new window with the previously saved to location already selected. After the restart I did another winecfg to check that no theme was selected and it was. There were no other changes you suggested.