There was a user that had deactivated all mods through UMM but activated them in DVMM again, which caused them to be loaded but inactive.
Adding a button or indicator on the details page if a mod is inactive could help quickly changing the state as most mods need a reboot after changing the state
Location of the status is in <SteamPath>\Derail Valley\DerailValley_Data\Managed\UnityModManager\Params.xml
There was a user that had deactivated all mods through UMM but activated them in DVMM again, which caused them to be loaded but inactive.
Adding a button or indicator on the details page if a mod is inactive could help quickly changing the state as most mods need a reboot after changing the state
Location of the status is in
<SteamPath>\Derail Valley\DerailValley_Data\Managed\UnityModManager\Params.xml