Unity Explorer works fine with Monkey. Make sure you install the right version (EDIT: I got it working, but only with Bep6. Monkey only works with Bep5, and I prefer to keep the convenient hotkeys, but the Bep5 version of explorer doesn't use your plugin, even if I place it in the same subfolder.
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) to a new directory. If this still doesn't work, enable the debug console in BepInEx.cfg and PM me the preloader messages, I'll take a look.-T-