Got rid of it
I can't remember having seen any hint in my download. In my download section it says:
"This is the .mxp installation file for CSS Form Builder.
Please note: CSS Form Builder includes all the functionality of the older Validation Toolkit. If you own Validation Toolkit and it is currently installed, you will need to uninstall the extension from the Adobe Extension Manager prior to installing CSS Form Builder."
Would it be possible to add a note to each of the extensions that this is not compatible with Dreamweaver CS.x ?
I have Validation Toolkit 2. Does the above message apply to any Validation Toolkit? It can really be difficult to remember which extensions replace others and should be installed or removed, the more if you have to re-install Dreamweaver and WebAssist creates bundles which include extensions already purchased earlier.
So, I upgraded to CS5.5 and removed Form Toolkit completely. I still get an error message like in screenshot. Yes, I have deleted the cache file. It still shows this.
Before I removed Form Toolkit I had installed in that order:
CSS Sculptor 3.0.2
CSS Menu Writer
Pro Maps Google
Social Media TK
PayPal eCommerce TK
Installed a couple of others later, but can't remember the order.