Bogus "not xml" warning (minor bug?)

Hi,

Import beam shift warns me that the path I have input does not end in xml, when it does end in xml.

Also I wonder if there is a way to make the string matching more automated? It always requires a bit of manual mucking about editing how much to cut from prefix/suffix but it seems like a string matching operation that should be possible to automate except in edge cases (which could still be handled manually)?

Cheers

Oli