There is an issue with both v1.9.5 and v1.9.6 of the plugin with many users finding that it no longer tracks hits on your site while other users have no issue at all.
I'm working on a long term fix to override all these issues and should hopefully have a performance improvement as well.
In the short term, I plan on reverting parts of the code to v1.9.4 which had it working for almost all users.
Before I release this, I suggest that you get hold of v1.9.4 of the plugin directly and upload to your plugins folder overwriting your existing install.
Please bear with me while I get the fix out and thank you for being a long term user of the plugin!