When IBM® Rational® Rhapsody® launches an Eclipse-based IDE, whether the generic Eclipse or Wind River Workbench, it checks the rhapsody.ini file to determine the path of the IDE.
Then entry that stores this information is called EclipsePath and it is located in the section [IDE]. During installation, you are prompted for the provide the path for Eclipse, and this information is copied to the rhapsody.ini file, for example:
EclipsePath=l:\windriver\workbench-2.4\wrwb\2.4\x86-win32\bin\wrwb.exe
If you want to switch between the generic Eclipse and Wind River Workbench, change the value of this entry in the rhapsody.ini file.