After having another problem and getting that fixed, I've came across another problem.
I can import as many files that I want into AF at the same time, after i've loaded it up. However, after they have been imported, I try to import another file, and the whole thing crashing, this has hppened about 6 times in a row, even restarted my computer and still no joy.
What format are the files? Where are they stored? What are your settings for OpenGL? What's your general graphics setup? Could be anything from security stuff blocking access to your harddrives going to sleep and not spinning up in time to issues when AE tries to generate the preview thumbnail to issues with drawing file dialogs on a more general system level. Could even be related to your otehr issues in your other thread...