WFB was working fine then suddenly I'm getting an error on startup. I've tried repair, I've uninstalled and reinstalled, but same error.
Any ideas welcome. Running win 7 Pro 64 bit if that helps.

What I would like you to first do is uninstall the version you have now and then download the software again from our website. To download any registered software or to download any free upgrades, please go to My Products from within your account. Once the software list appears, click the "download" button next to the software you wish to install.

Hopefully this has fixed your issue. If it does not, then we need to get our hands a bit more dirty.

Follow these steps:

1. Uninstall the software.

2. You will need to visit this site (http://www.ccleaner.com/), and download the free version by following the download links, then install it onto your computer. Now you will need to run the application and select the Registry tool on the left, then scan for issues. Next you will need to click "Fix selected issues" and do not back up the changes to the registry. Then click on the option to fix all selected issues.

3. Reboot

4. Repeat step 2 to make sure all issues were fixed. If new issues were found, reboot one more time.

Now we need to make sure .NET is installed:

1. Uninstall all versions of .NET from highest version to lowest version.

2. Reboot

3. Go to http://www.microsoft.com/download/en/details.aspx?id=21 and download dotNetFx35setup.exe and install it.

4. Reboot.

Now we are going to clear out all Windows Temp files:

Windows Vista/7/8/10: Go to the Start Menu and in the white box type %TEMP% and hit enter. I want you to select all the files and delete them. You may get a warning on one or two files that you cannot delete them, but that is ok.

Now it's time to re-install the software

1. To download any registered software or to download any free upgrades, please go to My Products from within your account. Once the software list appears, click the "download" button next to the software you wish to install.

2. Install Web Form Builder

With any luck, you should now be good to go!

Thanks. Will give that a go tomorrow and get back to you.

Wooop wooop - It worked, however it did take a few attempts. Not sure why it did it, but the good thing is it's back up and running.

Thanks for the help.