I think I had those kinds of errors too, which were caused by missing dependencies. Try running from a terminal window, so you can see error messages.
In my case, in addition to the usual mono runtimes, I had to manually install a few pieces that weren't picked up automatically, such as libmono-sqlite2.0-cil, libmono-winforms2.0-cil, libmono-corlib1.0-cil, and libgdiplus. There may be others, too, I'm just going from memory.
It would be nice if OpenMobile were properly packaged up for Linux distros, but until someone gets around to doing that (which may be never), we'll just have to use the installer and make sure the dependencies are in place.
ok I installed GDIPlus and get the installer to finish and the plugin installer opened installed plugins and finished with no errors, Open Mobile still will not open but I'm not getting any errors when launched.