Unable to load RP8 library in latest RP9 update

Been happily using Material Design Icon library in RP9, however performed Beta update today and went to re-add (library clears after update) and can no longer add library. In Windows Explorer the file type is no longer recognized as an RP library file, which means I can’t see the file in the window to select it (an action I have performed several times previously when updating RP9 Beta). I am not able to select ‘All files’ in the modal.

Any help appreciated as this library is essential for me and use it daily.

Is this my library? (From AxureThemes)

If so I can look at fixing this over the weekend.