GameFinder stops looking for Steam games if any Steam library isn't available about gamefinder

[Nutzzz]

You'll note that the exception you report actually occurs in another library that in turn GameFinder is using, NexusMods.Paths, though GameFinder's author @erri120 has had a hand in it.

In any case, I was eventually able to reproduce this. With both drive letters and path mounts located in a drive's root directory, no exception occurred for me with both 4.2.0 and 4.1.0 (the version Wabbajack 3.5.0.1 uses) after a drive is removed; there's an error message that the path isn't found, then it continues to search for additional locations. Steam wouldn't let me create a library with a path mount more than one directory deep off the root (it reports that it's not "empty" even if it is). I had to create the library first, move the data to the new drive, then create a path mount in the folder it was expecting.

The exception occurs on line 90 of SteamHandler.cs in libraryFolder.EnumerateAppManifestFilePaths(). Though there is a check that the directory exists, there isn't a check whether the "steamapps" subdir exists before it attempts to enumerate.

I've got a PR incoming...