I'm using Movie Edit Pro on Windows 10. I am editing a Zoom file that is 1.5 hours long. For one thing, it is extremely slow and I often have to wait several minutes just to move say from one end of the track to the other. (Previously I was working with files only 5-20 mins long and it was quite quick). Anyway now I have a very strange problem, which is that the playback controls that are usually under the main window on the left have vanished. So I can't test out what I have done. I have also had a message today saying that 'hardware acceleration has been deactivated'.
Is all this beause my laptop is just not up to such large files? I have 6 GB of RAM and about 20 GB free disk space.