I had a problem, where I shelved changes and lost the shelf. I found the patch file and tried both to import it to the shelf tab of the changes tool, or via the Version Control menu, just "Apply" the patch. After choosing either operation, a model file chooser drops down. However, it does not allow a file to be chosen and hangs idea which becomes un-responsive. So, I can't import the patch.
Mac OS X 10.6.7