Reason Downloads Propellerhead. How to install. Windows users Extract all files from the downloaded zip archive. Then double click the Install Reason. Mac users Open the disk image and drag the Reason 1. Applications folder on your hard drive. Reason 9. 5 without soundbanks. For those who already have the Reason 9. 5 soundbanks installed for example after participating in the Reason 9. 5 beta testing. How to install Windows users Extract all files from the downloaded zip archive. Then double click the Install Reason. exe installer. Mac users. FILExt. com is the file extension source. Here youll find a collection of file extensions many linked to the programs that created the files. This is the FILExt home. No more missed important software updates UpdateStar 11 lets you stay up to date and secure with the software on your computer.