VW 12.5 Breaks C4D Export Plugin in General Discussion Posted December 1, 2006 can someone tell me what is the file extension of the installer of the exchange plug in. I had requested my brother to order the plug in the states and he has been trying to e-mail me the installer. he is on a PC and i am on a mac. The file does not have a extension and is showing up as a unix executable. I added the .app and .pkg extensions to it but in both cases it failed. when i add .app the shows up as a classis application. can someone help me out here.