Glad to hear it is working again.
We list in the download center the extensions that will conflict with CSS Form builder. Just below the download link it says:
Please note: CSS Form Builder 2 includes all the functionality of the older Validation Toolkit and Digital File Pro, as well as the current versions of Universal Email and HTML Editor. If you own any of these tools and it is currently installed, you will need to uninstall these extensions from the Adobe Extension Manager prior to installing CSS Form Builder 2.