compatible with WP 3.9?

I’d like to know if I cab safely upgrade my WP to 3.9
Can someone tell me if Cimy User Manager 1.4.6 is compatible with WP 3.9? The compatibility information has not been updated and there are no votes for the combination yet…
Thanks!

https://wordpress.org/plugins/cimy-user-manager/