HP 7520 PhotoSmart Series desktop app won't run after reinstall

For some reason, my HP Scaning Utility stopped seeing my preinter, which is connected wirelessly.  I verified correct IP address and could print to it, but not scan.  I unstalled the software and reinstalled it but now the desktop app wont run at all - though it owrks fine as a printer.
When I run the app, I get a script error error about an undefined or null reference for UDCString_UDC Name and when i say to halt the script the HP Printer Assistant app is up with no icons for Scan, printer setup etc. and a couple of sttatements like "dynamic content goes here."
There is a dialog box that's there that just has there file names:
C:\Program Files\HP\HP PhotoSmart 7520 series\Bin\UDC_files/UDC_main.json
C:\Program Files\HP\HP PhotoSmart 7520 series\Bin\UDC_files/tasks.json
C:\Program Files\HP\HP PhotoSmart 7520 series\Bin\UDC_files/url.json
C:\Program Files\HP\HP PhotoSmart 7520 series\Bin\UDC_files/localize_1033.json
The only thing in that directory is a subdirectory named img and that has one file in it - an icon file named hplogo
I've tried removing reinstalling 3 times, manually downloading software or using recommened assitant or wizard.
What should I do next?

Hey @cpolizzi !
Thanks for posting in the HP Support Forum.
I understand you're encountering a script error when trying to load the Printer Assistant for your Photosmart 7520 e-All-in-One Printer.
I have some troubleshooting steps that may resolve this particular issue.  Click on the following article link and work through the steps in 'Solution One.':
HP Printer Assistant Opens with a Script Error or in Notepad
Should the error persist, you can complete what is effectively the same fix using the more hands-on manual approach in 'Solution Two.'  You'll find all the applicable steps within the same article from HP. 
Let me know how this works out for you.
Have a great day!
E-roq
I work on behalf of HP.
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

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