When crossover was installed to a non-standard location, crossover_path
gets set to a new path. Previously, crossover_path was immutable, so the
user would be correctly queried for their non-default Crossover path, but the
location would be reset to the default path right after the custom path handling.
When crossover was installed to a non-standard location,
crossover_pathgets set to a new path. Previously,crossover_pathwas immutable, so the user would be correctly queried for their non-default Crossover path, but the location would be reset to the default path right after the custom path handling.