One last thing to try:
manually re-register the project management component:
> regsvr32 C:\CCStudio_v3.3\cc\bin\projsvr.dll
re-register the build tools:
> regsvr32 C:\CCStudio_v3.3\C6000\cgtools\bin\bti6000.dll
make sure you have admin access to do both. Actually you should always run CCSv3.3 with admin rights on win 7.