When I attempted to automatically update the latest 1.52 version, get a 404 when trying to run the plugin.
Same with 1.51, 1.43: only manual install via SFTP possible, and then that's all, no activation, deactivation, or deletions from within admin, only 404s.
I had had a prior version (version ? unknown) installed & it worked perfectly, scanned, not problems.
Checked other plugins for same 404 problem just to be sure, but none; unique to this plugin.