I don't know why, maybe it's beta version,
the context menu popups very slowly after I right clicked on any item in the Explorer area. It takes about 5~7sec to show up.
And sometime, memory usage will raise to 99% while context menu isn't showed up and then get normal.
Left click is fine, but a little bit slow(about 1s of latence).

I hope it can be fixed.
While I just started using StarUML, I think it would be a very useful tool for me.

Regards,