Yeah, vBExperience has hit alot of us as not being supported. Author logged in resently, but no onger supports vBExperience. But, the author does support other mods they have written.
I think everyone should donate to vBExperience author if they truly care about the modification. I have sent in money last year to the author, but I think they need a reason to want to come back and support the product. Maybe to many freeloaders complain? Maybe that is why he stopped supporting their code?
I run 3.8.4 P2, but maybe those who want a 4.0.x release should donate to the authtor enough money to buy the $250USD upgrade.
Note:
The vBExperience author does not have 4.0.x on their site.