It was sent to your old email address which you don't have access to. Now you have to wait until September 8, then there will be a link to send a confirmation to your new email.
Steering wheels have bump stops enabled by default. Wheels that are recognised as "first person controller" or other types have this extra option to enable the bump stops manually.
"your mods" shows mods which you have submitted, which is correct (you don't have your own mods). To display your favorite mods, click 受欢迎 (the button above "your mods').
I think we've been through this conversation many times... the developers have stated many times that they simply don't want to hire any more people "to speeed up development", it's not about money, it's just that they want to work on their own, at their own pace.
If you open the readme.txt file from the music addon zip, it says that they were created by Victor van Vlaardingen, the LFS webmaster. He created a lot of music tracks in the past.
Version 5.0.0 released with removed InSim Relay API which has been discontinued, and a minor breaking change in the OutGauge / OutSim constructor options.
It means that the email address is already used by another user account. Are you sure you don't have another LFS account with your new email address already?