I don't know how I missed this thread in my search for this problem. I'm running into the same issue. Earlier today, I sent an email to support detailing my process. Just a quick rehash below:
Today (10/19/22), when I clicked on "Check for Updates", I was notified a new program update was available (2023 4K Archive Edition). After the update, ComicBase closed so I restarted ComicBase and it asked for my login information.. I entered login info, let program start, check for updates, and clicked link for unrecognized items. A pop-up with the error, "could not start process with arguments" was reported. I do not know if the program update had contributed to this issue as I haven't used the unrecognized item link in months.
Among my attempts to fix, I optimized the database and rebuilt the lists, closed & reopened ComicBase as well as restarting the computer. None of these actions helped. In addition, I verified no web browsers were open when clicking on the unrecognized items link.
Tasks-to-do:
Check if report was generated (Is link bad?)
This weekend, try the steps listed by Steven Dasinger
Try any recommendations from my email to customer support
Re-install ComicBase?
I will post again when I get more information.
-Dennis
ComicBase 2023 4K Archive Edition v23.0.0.1880 <no other versions listed in Apps & Features>
SQLite v3.30.1
Windows 10 Pro v21H2 (19044.2130)