A few days ago, the latest build of Doom 64 EX has been released including the corresponding editor. There is a huge amount of bugfixes and it also introduces several new features. Even though it was supposed to be the last version that handles bugfixes, but you might still expect some flaws as Kaiser just stated on Tuesday. But anyway, it's a release to have and to download, even if you only want to help track the remaining things down and support the developers.