A new release is available through the forum. The help file is not updated yet.
This update contains a way to select incomplete glyphs. This way you can delete unwanted glyphs.
http://www.high-logic.com/prerelease/fcp422.zip
Unzip it and copy it to your existing fcp4 folder.
If you are willing to try this release, let me know your results by posting your comments and bug reports in the corresponding forums (the announcements forum is read-only).