I'm getting back here a year later. - I can't recall what I did, probably a Paperport re-install and it has been working. It settled back in after I bought an installed Vue Scan which is an excellent scan mgr but nowhere as useful as Paperport in managing files. In Paperport, you can open a folder of choice and scan and the item will be saved in that folder. Inside PPort, it's easy to move files from one folder to another. In VueScan, one must write out the destination for every file scanned or to save the hassle of all that typing, scan everything to the same folder then cut and paste. It has other merits, but this feature is a demerit.
I did not know that Kofax still offered Paperport and someday that may be worth investigating.
Revo uninstaller is a good tip (it has good online reviews, too).
And the tip about rolling back a Windows update one day will come in handy. Widows compatability and troubleshooter not so helpful in this instance.