Board Thread:General Mod Discussion/@comment-32013442-20190216195415/@comment-27219153-20190216223459

Locate the region files of the area you wish to delete. Then go to / /MiddleEarth/region/ and delete those region files. Alternatively, use Joetater to selectively save areas you wish to keep and then delete everything else. You could use a combination of the two if you prefer.