Command / flag to detect on demand duplicate app installations / installations outside applications folders:
list --multiple
multiple
Show all paths for duplicate app ID installations in your applications folders.
list --outside
outside
Show all paths for app ID installations outside your applications folders.
Probably use flags because you might want to show multiple & outside in the same output. Could make --problems to include all problems, currently just --multiple & --outside, but possibly others in the future. Or combine multiple flags.
See #1185 (comment)