I tried several times to open the program (Acrobat DC) on my iPad Air, but it kept crashing upon startup. Had 2 years worth of documents in the local file location. I deleted the app and reinstalled, My tablets available space has not changed. Is it possible the information is still on my tablet?
I am so sorry that you had a bad experience with the new Acrobat DC app.
If you uninstall any iOS app (not just Acrobat DC for iOS), iOS will erase all associated app data including your PDF documents. If you have a full backup of your iPad before the Acrobat DC update, you should be able to restore it and turn off the automatic update of apps.
You mentioned "2 years worth of documents". Do you recall the total size of the documents? We heard from other users that they experienced the same or similar crash and had over 1.5 GB of PDF documents stored locally on iPad.