Tech support replied with these recomendations:
1. Make sure that you have the files panel closed when running the wizard.
2. Rename the configuration folder to configuration_back. This will have the effect of disabling all of the installed extensions. You should open the extension manager and remove all extensions to clear the extension mangers cache. After removing the extensions you can then reinstall them making sure to download the latest versions from your order history. When installing the extensions if you are prompted to overwrite any existing files select 'yes to all'.
There is a a WA_AppBuilder.php file located under the WA_DataAssist website directory. Perhaps something is looking for the wrong file type?
I am thinking of trying without the Search page/Function. Would it be a lot of work to add after? Not my first choice as I need to run DataAssist with the search functionality min. 7 times in all including admin backend.
To access the DataAssist Wizard, I have to opened a blank.php (no headers or anything set up) in the target directory where I want the file to be created. This time code was writen into the blank.php. I looks to me like it inserted both editable region codes for Search and the Detail pages, right on top of the Doctype lines. Looks like similar effect in the Resaults.php page. The template editable region was ignored and it just did its own thing. And yes, I did have the correct template and editable region configured and it showed up fine durring the configuration process.