Please note that we did not write the AutoViewer extension for WYSIWYG Web Builder ourselves and as downloads of the extension are restricted to registered users of WYSIWYG Web Builder only, I am not familiar with the extension's code or file structure.
However, all you should have to do to upgrade the extension from Standard to Pro is replace a single file.
The extension will come bundled with the Standard version of the 'autoviewer.swf' file and, once you find it, replace it with the Pro version of the 'autoviewer.swf' file from the AutoViewer-Pro zip package ('autoviewer_pro/web/autoviewer.swf').
Instructions for upgrading the extension should hopefully be somewhere within the extension's files. (For their SimpleViewer extension, I believe the instructions are in a PDF file.) If you need help in finding the location of the 'autoviewer.swf' file within the extension, please contact WYSIWYG Web Builder support who should be able to help you further.
If using Quick 'n Easy Web Builder (which looks to be very similar to WYSIWYG Web Builder), then their own instructions for upgrading their extension are as follows:
AutoViewer-Pro does not include the download link. Note however that this extension
does not support the advanced customization that is available in the Pro version!
If you click the ‘Pro Version’ button then you can select the path of the pro version
(autoviewer.swf). In that case this version of the viewer will be published instead of
the free version.
You can purchase the AutoViewer-Pro version here:
Perhaps WYSIWYG Web Builder also has a 'Pro Version' button which allows you to point towards the path to the 'autoviewer.swf' file from the AutoViewer-Pro zip package ('autoviewer_pro/web/autoviewer.swf').
SimpleViewer Support Team.