Hi John,
Today I have worked with 3 toad instances:
Toad 1 (instance)
Toad 2 (virtual instance)
Toad 3 (virtual instance)
...and so far I haven't had any problems or crashes.
I have cut the internet, to cause the disconnection to the databases and force errors, ...but I have not had any problems.
I hit re-connect the connections to the databases and it continued to work smoothly... I even noticed faster!
When I used the NON-virtualized instances I always had problems or it got a bit slower when reconnecting.
Hopefully you can get it to behave like this but with NOT virtualized instances and thus be able to use and update the "Workspaces".
Thanks John!, excellent work!