If you have any problems with the software, whether it is the basic or pro version or you just want to give feedback, don't hesitate to contact us at Mandomartis support.
Only a single configuration name is supported per page. This happens because the function names and variables are named the same in the scripts, thus conflicting with each other. However as a workaround, you can open the configuration in Effect Maker, save it under another name and insert it together with the first configuration, even if you didn't do any changes.
Make sure that the images you upload are of roughly the same size like the effect area (width and height fields).
Make sure that the images you have specified really exist in your upload folder or image gallery. Some effects (like Image Scroller) crashes if the images don't exist. This could happen if you delete images from your upload folder or image gallery and you have effects that depend on those images.
If you are trying to use the Effect maker web part on a public web site it won't work for anonymous users. This is a bug in Sharepoint which means that apps cannot read from lists in public web sites, there's no workaround for this. If you or one of your users get this on your private Sharepoint site collection, then make sure that these users have at least read rights to the Effect Maker User Configurations and Effect Maker Work Folder lists.
If you have the basic edition which is the free, upgrade to the pro edition which has many more effects!