This is no doubt the BEST custom database plugin here at WordPress. I use it for keeping a catalog of books, and honestly, you can use the plugin for making a database of almost anything! So would you please consider revamping your plugin? Instead of specifically labeling it as a Participants Database, it would be AWESOME if it were packaged simply as maybe; WP Custom Database, or Database PRO, or XNAU Database, etc. you get the idea. Doing this would make it friendlier and more popular to users who are looking for this kind of plugin but are not necessarily going to use it for a list of participants.
I also wouldn't mind contributing to a fundraiser if ever you decide to make a Kickstarter page for a Revamped Participants Database project. I know I'm not the only one who wants this and I'm sure there are a lot of users willing to support and donate for this project as well.
Also, It would be extremely awesome if you can add a customization setting in the plugin that would change the look/theme of the Table/List without having to access my file manager in order to create a template.
Thanks for hearing my thoughts!