I installed the standalone Beta 1, downloaded Beta 2 today and it noticed the standalone install was disabled. I uninstalled the previous version and the reinstall picked up my workspace. My guess is because it was in the default location (Vista x64 Ultimate):
C:\Users\%USER%\Adobe ColdFusion Builder workspace
An information technology professional with twenty one year's experience in systems administration, computer programming, requirements gathering, customer service, and technical support.