Originally posted by ImOnLSDnShrooms:

Is there a configuration manager on thunderstore that will work with Valheim plus?

ValheimPlus is also available on Thunderstore (it's not Nexus-exclusive), so either the Thunderstore Mod Manager (official for the store, but maintained and distributed by a third party) or R2ModMan (my preferred - modder maintained and distributed directly through Thunderstore) will work.