DataAssist, SecurityAssist and CSS Formbuilder won't startup, Dreamweaver CS6 frozen on Windows 7 with the latest Xamp.

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before starting, make sure you have created a site in dreamweaver:
http://www.webassist.com/tutorials/Define-a-dynamic-site-in-CS5

create a new blank PHP page and save it to your site, have that page open before starting the wizard.

with Security Assist and Data Assist, it is a good idea to create the database connection before starting:
http://www.webassist.com/tutorials/Create-a-PHP-database-connection

That's exactly how I did it. With a database connection of course. It looks more like software conflict.

What extensions are installed includeing the version numbers?

The extensions that we offer that are compatible with DW CS 6 are:
eCart 5.0.7
Free Tools 1.0.5
Design Extender 1.1.5
Data Bridge 1.1.4 (this is a consolidation of our Data driven extensions including an upgrade to Data Assist 3 and Security Assist)

if you are using the stand alone versions, they are not compatible with DW CS6, you will need to continue using your previous version of Dreamweaver.

Data Bridge
Current version: 1.1.4
Released: July 15, 2013

Design Extender
Current version: 1.1.5
Released: July 19, 2013

eCart
Current version: 5.0.7
Released: February 27, 2013

Free Tools
Current version: 1.0.5
Released: July 15, 2013

What order where they installed in? I recommend installing in the following order:

eCart 5.0.7
Free Tools 1.0.5
Design Extender 1.1.5
Data Bridge 1.1.4


also, try disabling the Preview, go to WebAssist -> Preferances in the Preview section, select the option to disable the preview.

I have re-installed everything in following order as you specified. I have not tested everything, but it seems to react with the preview of, with preview on same problem
.
Can you get the preview working without problems. That's where I bought the software for!

you can view the preview by clicking the preview window, that will load the preview in the browser.

It responds very slowly. With all the respect, I think it's a disappointing way to work. Is it because of my computer, why doesn't it work like promised?

The preview issue is caused by a compatibility problem with the newly released IE 11.