Currently only the Full version of ArtRage 2.2 has a Universal Binary for MacOSX. We're in the process of putting together the free build this week, it should be released early next week, so long as testing goes well.
The Auto Updater only works with the Full version of ArtRage
It will not work with the Free version of ArtRage. After all, when there's a new update to the free version you can just download the complete installer again.
If you want the advantage of having an auto-updater, (and get layers, layer blend modes, more tools, more control, reference images, metallics, PSD import/export, etc) then you can buy the Full version for just US$19.95
Heck, at that price even if there was only one feature of the Full version you liked, it would still be well worth it!
AndyRage's mantra for graphics engine code:
"Sure - how hard can it be?"