Works very well in version 1.16.4 with both slime and honey blocks. The plugin seems to stop the TNT from activating rather than constantly looking for redstone updates from the activator rail to the TNT, which is nice for servers.
Works perfectly on 1.15.2, just install it, no config needed. If this were bundled with duplication prevention of other stuff (carpets, rails etc.) it would be even better, great work!