Adobe Acrobat Pro’s Modification Date doesn’t change when app is updated

[WSBMD]

When I update my Adobe apps, the app’s modification date and time are changed accordingly — except Acrobat Pro.  (See below)

According to Acrobat’s Modification Date, it hasn’t been updated since 2019:

 

Also, when I try to open “About Adobe Acrobat Pro DC” from the app’s menu, it hangs up and I have to Force Quit:

Diagnosis, anyone?     

[WSBMD]

This issue was resolved with the help of Adobe TS  over the phone.  Per their instructions, I downloaded AcroCleanerMac.dmg, a more muscular version of the Acrobat Uninstaller; after running it, I downloaded Acrobat_DC_Web_WWMUI.dmg and re-installed Acrobat Pro DC.