I just finished reinstalling SU7.0- turned out to be much harder than I was led to expect as simply uninstalling SU7.1 and installing SU7.0 screwed up the registry so SU7.0 wouldn't run. When I finally got it installed and running, V-Ray for SU wouldn't load.
3 hours later I finally got it to work thus:
**1 ) Copy the "Google 7" folder (which contains the SU 7.1 files) from "Program Files" to "My Documents" as a backup.
2 ) Uninstall SU7.1 using CCleaner.
3 ) Run CCleaner's registry tool.
4 ) Run Registry Mechanic.
5 ) Manually delete the "Google 7" folder from "Program Files". Not deleting this is what screwed up the install the first two times.
6 ) Run CCleaner's registry tool again.
7 ) Run Registry Mechanic again.
8 ) Reboot.
9 ) Install SU7.0.
10 ) Reboot.
- Copy backed-up SU 7.1 files (Components, Materials, Plugins, Styles) from their folder in My Docs into the newly installed "Google 7" folder in "Program Files".
12 ) Reinstall/Repair V-Ray for SU (it didn't load the first time).
13 ) Reboot.
SU and V-Ray for SU appear to be working ok now, although I haven't run the test skp/VfSU file which was crashing this morning yet. Tests will continue tomorrow.**
Of course I can't say for sure that it was SU 7.1 which was causing these problems, but it's a huge coincidence that I've never seen SU crash to desktop before. That, combined with SU7.1 freezing when orbiting is enough to rule out using it for day to day work until the cause is tracked down.