Originally Posted by MeSue
One more suggestion for the OP: if you are on Windows, did you try the "previous versions" feature in the Mobile Applications folder of your computer? In other words, go to that folder in Windows explorer, right click and go to properties, and look for previous versions. It will show you previously deleted files that you can restore. If its been a while, it might not be restorable. :-(
That wouldn't work. IPAs have the version number on the filename, ex. Gmail 2.3.0.ipa.