Parallel Installation of the CRJ is not allowed by the installer. So this is an "either or"-decision. But some of the add-ons (such as squawkbox) won't run under X-Plane in 64bit... So, why don't you support both 32 and 64 bits?! As almost all other add-on devs? Regarding the "it does not work"-topic. I have explained everything to Cameron already via mail, including logs.. So once again: - I have un-installed version 1.5.2, installed version 1.5.3., activated. PFD remains black - camerons comment was to move X-Plane from Programs-Folder to Desktop - but moving to Desktop or even root did not work as well. PFD remains black. This is just making me angry. I have been discussing about this topic for more than a year now. First excuse was: "Just wait for 64bit, everything will be sorted out". Now 64 bit is out, and it is still not working. This is a high-price product, thus I expect it to work!