As of V5.20 beta 8 the Windows installers include an option to allow multiple instances so this installer version is no longer required.
Beta release, Windows Installer with JRE allowing multiple REW instances.
This version of the installer includes a 32-bit JRE
See Updates for the latest changes
No longer used: REW Windows installer with JRE allowing multiple instances V5.20 beta 7
Allows multiple REW instances to run at the same time