After struggling for almost a day, wondering why I couldn't deploy my AWT mobile app to my local ME Client (I was missing the Manifest file, but couldn't for the life of me figure out why the Mobile Component was not being updated), I finally figured out how:
It doesn't help to delete the Mobile Component in the WebConsole and recreate it, because you still have the same file sitting in /pub/meapps/awt. Even if you select Change, and update the file from the same file path on your local drive, this does not update the file on the server. You have to make sure that you are uploading the .jar file from a different path (simply changing the name of the .jar file is enough).
I hope these kind of problems can be fixed in future versions of ME. Any SAP ME Developers reading this?