I downloaded a free Alabama design from Apex Embroidery and was wondering if any could tell me how to make it a towel topper?

Well somebody beat me to it and gave u an even better answer which I'm sure we're all thankful for.

Happy sewing
Starlet

Here is a video for towel toppers
The 2nd link is for a blank towel topper you can add your design to if it isn't a towel topper design already