Before when you type /nomini or /mymini it would destroy your old heli and spawn a new, niether are working.  Is there any way to despawn your mini?

Sorry for the delayed reply. There was a change some time ago that caused /nomini to no longer respawn the mini. It now just despawns it (more intuitive). There was also a change to add the MaxNoMiniDistance config option which prevents players from despawning their mini if it's too far away. Unfortunately that was released without clear indication that the change was backwards incompatible, and there were some issues with the wrong error message being displayed, so this caused some pain for users. The error messaging was recently addressed and the MaxNoMiniDistance option can now be set to -1 to allow fetching or despawning your mini at unlimited distance (in case you just don't want to deal with that feature).