Hi , I believe in order to do this, you will need to un-install and re-install Compose. During installation, you are asked for the location for the install which impacts the service etc.
An un-install, and re-install - then copy and replace the new /DATA directory with the existing data directory under the E:\ folder should put your projects etc. back also.
<Make sure you backup the DATA directory under the E:\Program Files\Qlik\Compose\ directory before un-installing.