The ProblemIn CQ5.5 SP1, CRXDE does not have code complete, classes can't be found, laptop is in serious risk of defenestration.
The SolutionGo to Package Share in CQ5 admin on author.
Log in if required with your adobe id.
Click on Download for:
1. Missing CRXDE-Libs
2. CRX Hotfix Pack
And install these packages.
Restart CQ5 and CRXDE, and hopefully this will have resolved the issue.