I’ve just realised that the plug-ins on the site weren’t the versions that I have fixed for Mavericks. I had fixed them almost as soon as Mavericks was released so my students could continue using them, so apologies for not sharing! I’ve replaced all the Mac versions on the WigWare page with the updated graphical versions (the DSP code worked fine, it was the gfx that had issues).
If anyone has any problems with these, please let me know!