The IMatch installer contains options that make the photools.com\IMatch6 folder hierarchy writable for "All Users".
Sometimes this seems to fail, as in your case, for reasons unknown.
Quotehow can a data folder be used? Isn't the entire point of a data folder a place to put/write data?
It's even worse with "apps" installed from the Microsoft Store.
Apps get their own virtual "program data" and "user data folders" to isolate them. That's all they see when they try to access "program data". They don't get access to the "real" program data folder, unless some clunky and probably unreliable work-arounds are used.
The reason for this is
isolation. Windows apps are prevented from reading or modifying data written by other software.
Which causes real problems for software like, e.g., IMatch, which uses the shared data folder to actually maintain shared data accessible for all users: settings database, presets etc.