This demo version limits the Harmonizer and Tuner to three uses per FontLab session, the other tools restrict the values you can enter in the dialogs. The full version allows unlimited use.
The Font Remix Tools are compatible with both the Macintosh and Windows versions of FontLab Studio 5.0.2 or later. They come with an easy-to-use installer so you do not need any specific knowledge of how to get FontLab macros to work. RMX requires Python, which is pre-installed on Mac OS and freely available for Windows.
RMX for FontLab demo