1 How do I install the NightlyBuilds version?
First, go to your Steam Library and right-click on LOTUS Simulator, then go to Properties.
There you go to the top of the BETAS tab and select NightlyBuilds from the list (Nightly Builds, fixing issues or creating new ones. Get always the most recent release candidate of LOTUS.)
Note: It is ALWAYS important to read the patchnotes of the NB version!