Aha... sorry for the confusion, it's not the PowerCMS editors. If you look at the menu across the top in the CMS, you will see I have edited it and it's no longer the standard PowerCMS menu, it's a text based menu for my own pages that I've created using DA. I've added the HTML editor to the DA generated pages while using the Webassist > Database > DataAssist Pages wizard.
I had assumed that the DataAssist Wizard and the PowerCMS would use the same files and details for the HTML editor image upload. I guess not, or more than likely I have made an error during set up of the DA version.
If you click on the blog section in the CMS, you will see a test record. Edit that and you will see that the 'Browse Server' window that appears when you click to add an image doesn't work!
Based on this help file http://assets.webassist.com/html-help/334/general.html, I've edited my local version of the HTML editor using the wizard to allow it to upload files, but it tells me I need to:
"Enter a subdirectory for this file manager instance.
This is based on the upload directory that is specified in the Site Settings interface.
If you have not configured the Site Settings yet, you will be prompted to do so before completing the HTML Editor interface.
However, I wasn't prompted and I can't find where I might edit site settings. I've not created any site settings using DA, so I'm a bit lost!
I've just looked at WebAssist > Preferences and there is a file manipulation tab, but I'm not sure if I need to enter my default image folder info there or not. I'm not sure if that pertains to just the site I am currently editing, or if it pertains to all sites.