Dreamweaver CS4 crashing when using CSS Form Builder

Hello. Hoping you can assist. I have read through related messages for help, and after trying a few things, I still have my Dreamweaver crash when customising fields on a new form. CSS Form Builder just locks up and says (Not Responding).

Problem first started whilst I was using version 2.0.0. I would get as far as clicking the 'Edit' button from the Form Contents screen, and it would lock up. I discovered a new version, so uninstalled the earlier version, and installed the newer version. Software appeared to run a bit quicker and I was able to add and delete fields, so I thought the issue was resolved.

I don't even get as far as finishing the form before it no longer responds. I can pre-select a form, and edit the fields and go back to the Form Content screen, but if I try to re-enter the Edit button or Finish the form, it stalls, and says (Not Responding).

I have cleared the .dat file, closed and restarted Dreamweaver, created a new php page, closed down the majority of my programs to free up memory. I don't know what is wrong. I have relooked at the 'common problems' page and done its suggestions. Problem is still occurring.

Something strange is happening also, the form I saved as a single preset, the preview has applied this design into every preset form, and all the form designs look the same. This is a mess.

It has been a while since I have used CSS Form Builder, but on last time, I haven't had this issue.

I use Dreamweaver CS4. Windows 7 PC.
CSS Form Builder 2.0.1, this is the only Webassist extension I have installed.

I'm really you can help.