Been having this issue ever since I upgraded to 5.5...
Finish a video in Premiere, export to AME, click the play/start encode. In the encode status, it gets to "Processing: Reading XMP" and simply hangs there indefinitely (hours). Clicking to stop/pause the encode doesn't actually stop it, only way to do anything is to force-quit AME. Then it won't re-open until a restart. Only way I can export my final video from Premiere is the direct export, which works well enough when it's a single video basis, but when I want to do a batch of exports, or continue editing something else while exporting, this completely puts me at a stand-still.
Any idea what's with AME just stalling out on me here?