[bpwhistler]

Thanks @bugvi. I compared your script to one of mine (I use 3: start date only, due date only, start/due date combined). When I saw that my "start/due date combined" was exactly the same as yours as well as my Mail rule, I realized something else must be going on, since you're able to at least get it to work with your iCloud account. I keep my scripts folder in Dropbox to keep it synced between all my Macs. I use symlinks to redirect. Apparently during the installation of the App store version, my symlinks were corrupted. I rebuilt them and all is good. My scripts now function in both iCloud and my Exchange accounts. This combined with changing my scripts and my launch services database corrected everything.

Thanks bugvi, Lizard, and whparlmer4 for your help.