When right-clicking a waystone in the 1.7.10 it doesn't open the GUI it just "discovers" that waystone once more. (The message and particle effects and everything.)

Waystone-to-waystone teleportation was only added in later versions of Minecraft. 1.7.10 requires the warp stone to be used for teleportation.

Any chance of an updated version?
If it's too much hassle I can code it myself if I'm allowed.

If that is the case; The build will not be redistributed I'll only use it on my local neighborhood server

Edit: NVM, just noticed the 1.7.10 code isn't uploaded here.

I generally don't backport new features to old versions (especially when they're that old), but you're free to modify the mod as you wish.

The 1.7.10 code is on the master branch (from before I switched to versioned branches).