yes, therefore I thought also somewhat about the accounting. On other side is the “application” not exact the same as MS-Store install, e.g in point of loaded dlls.
You can of course tweek the steam files.. there is a local cache of it. We had somewhere a topic because a user had a issue with a profile setting. But what these have to do with the account.. hmmm.
ah.. I found my bookmark with the summary: Steam - CTD on Startup (after splash screen) - #11 by eaglechlapf6920
there are other usefull links in that thread 