Signatures only seen to logged in users

I installed GD bbpress tools to use bbp signatures and it works great on front end!

The problem is that the signatures are only seen to logged in users, unlike the other forum systems.

I’m not sure if it’s intended function or a bug.

If there’s a way to show signatures to all visitors and lurkers, could you kindly tell me how to do the code tweaks.

Thank you so much in advance!

https://www.ads-software.com/extend/plugins/gd-bbpress-tools/