When I log in I no longer see anything but the player. I cannot import, I do not have effects, there is no menu, I cannot do anything other than watch a previous video. When other users log in to the same computer theirs comes up correctly. Please help.
This sounds like your startup file (ini file) for the program is corrupted, if this is the only program that exhibits this behaviour then try the following:
Start Movie Edit Pro (MEP)
When the dialog opens to ask if you want to start a new project or load project, choose New project
You may see the timeline and other panes flash then disappear leaving the Preview Monitor only at this point.