i am not sure that it is anything to do with new Plugins i just installed, but my SH3D suddenly -

- will not open previous files (and earlier would not do 3D in separate window)
- will not close app
- will create NEW test plan, and it will do 3D, but will not save or close
- i have uninstalled some but not all Plug-ins, and actually all Plugins are working (incl Plugin Manager which is very nice)

it seems to me to be related to new Plugins, otherwise that would be a big co-incidence

not sure where i look for similar previous cases