Plan to make it compatible?

HI, I am in charge of a festival and your plugin seems perfect for my needs. It looks like it is not compatible with the newest version of WordPress. Any plan on making it compatible? I installed the plugin but when I try to see a Venue or a performer, it gives an Error 404 page.

My website is: http://ffga.ca

Permalink for 1 venue : http://ffga.ca/venue/bistro-lautre-oeil/
Permalink for 1 performer : http://ffga.ca/performer/genevieve-rb-et-alain-barbeau/ ‎

Thank you for you help.