The simple wild cards for path are : * and ..., they are automatically replaced by regexes
It is not recommended to use regexes in the path (need to start to escape any special characters, by example file.txt has to be file\.txt ), instead you can use whitelist and blacklists that can contain regexes.
so with your case,
has to be something like
whitelist = .*MS?\.log\.gz
while the second should work because it uses only wildcards.