Well, no "free" way out, no. Especially for X-Plane 9 it appears. It is slightly baffling that the other plug-ins work okay on Mavericks, but I think what is going on here is the CRJ needs some libraries that don't appear to be available any longer in 32-bit format for Mavericks. Your option to "fix" this is to actually upgrade to X-Plane 10. Personally, I think you'll enjoy XP 10 MUCH more than 9, but it's not free. This is a very unique predicament you are in, Norkypoint. I don't want you to be stuck with a piece of software you can't use, so if you do not want to upgrade to X-Plane 10 and use the CRJ there (it will work), then please contact our support with the support ticket system and I'll make sure you get refunded for your purchase. Wish I could offer more here!