ReWire and Rex As a result of the enhanced security features in Windows Vista, Reason can no longer install the ReWire Shared Library and the Rex Shared Library properly. Early migrators to Windows Vista may experience problems when trying to use a Rewire system as well as problems using non-Propellerhead applications that read Rex files. Propellerhead Software is working on a solution for these problems. However, at this point in time we unfortunately can not tell when that solution will be available. Any news will be posted on our web site.