I have several sets of brushes in .ABR files, which GIMP has no trouble reading as brushes. However, when I try to "open brush as image" (which is NOT greyed out), I get an error message, "Unknown file type". How do I get around this?
Click and drag, from the brushes dock into the Gimp toolbox. For a Gimp brush you might need to lose alpha and change to grayscale before saving as a .gbr
Both worked like a charm, although the AbrMate generates an error (not insurmountable) when I select "Close selected brush set". "Close all brush sets" works fine. It's really nice to be able to pick and choose which ones I want to convert, too.