FYI..
There is a hidden button that allows you to save and load strum patterns to the Data folder in the Renegade Acoustic folder. In Strum mode, just click in the upper left corner of the GUI above the "SOLO" button, and below the guitar picture icon. Save and Load buttons will appear. This function was included mainly for use during development, but it could be useful for users as well.
This, of course, makes it possible for Renegade Acoustic owners to share their own strum patterns (only the .nka files you create).
In the Data folder, you'll also find backups for the strum patterns you can load back in if you need to.
This trick also works for Effects presets when the Effects panel is open.