OS: Windows 10 - 64bit
Missing XMP dropdown in search menu
Effect: missing ability to add search conditions from xmp metadata fields which was previously working in version 1.4.3
To reproduce:
1. Tools > Search (or Ctrl-F)
2. Select "Add>>"
Actual behaviour (bug): Option to Select XMP fields is missing from Search dropdown menu.

Expected behaviour: Previously XMP fields were able to be selected from the menu.