Hey @adam_cowley,
Thanks for your reply. I did restart it, multiple times. I guess the plugin is not installed at all, since there are no dbms procedures started by neosemantics. No such procedures are initiated, I've checked it with both versions of neosemantics (4.0.0.0.0 and 4.0.0.1) and for both versions of neo4j (1.2.6 and 1.2.8). However I cannot understand why it does not get installed.