Extensions not installing correctly

I am using Dreamweaver CS6 with your extensions ECart, Design Extender and Data Bridge. I have today downloaded the latest versions of the extensions. Using Adobe's Extension Manager I uninstalled all three extensions and, installed the latest versions in the following order ECart, Design Extender and finally Data Bridge. How I wish I hadn't bothered - what followed was total chaos.

I then received all sorts of error messages for example a file was missing - when I checked the diagnosis was correct it wasn't present. Then your own "uninstall" programs started despite the fact that pre installing any extension there should have been nothing to uninstall!

I have attached as series of screenshots which might at least assist you in understanding the "problems" I now face. I have uninstalled the extensions several times and re-installed them ECart first and have always shut down and reloaded Dreamweaver, each time I uninstalled or installed a program.

I am getting seriously worried at the quality of your extensions which frankly never function as promised. Your customers should not have to spend half their life trying to get them and Dreamweaver to function correctly. If anyone can address these issues I would be grateful as I cannot even open a file or make a new one without being interrupted by these error messages.

Regards

Cheyanne

Looks like the users configuration folder has become corrupted.

recreate the users configuration folder as outlined in step 12 of the Adobe troubleshooting guide:
http://helpx.adobe.com/dreamweaver/kb/troubleshoot-javascript-errors-dreamweaver-cs4.html#main_user_config

after renaming the configuration folder, open Dreamweaver, and go to Commands -> Manage Extensions to open the Extension Manager, once the Extension Manager is open, close Dreamweaver.

In the Extension Manager, select each extension and uninstall them, then reinstall the extensions.