How to reconfigure the installation of Creo Parametric 3.0

This seems like an old post.  In case it's still useful, here is what I do through my configurator:

1. Declare a couple of environment variables in your launching script, such as:
   1. set LICENSESERVER=7788@10.257.257.258               (Put your appropriate server here).
      set LICENSEOPTION=PROE_MechModel (93 209)            (These are for Reverse Engineering)
2. Open the file parametric.psf (usually located at the \Parametric\bin\ folder) and modify the following lines:
   1. ENV=PTC_D_LICENSE_FILE=%LICENSESERVER%
      ENV=CREOPMA_FEATURE_NAME=%LICENSEOPTION%

That should allow you to solve your issue without reconfiguring Creo every time, but you still need to update the environment variables by hand when your need changes.  I hope this still helps someone.