In OJS 2.4.3 the counter reports plugin moved from the generic plugin directory to the reports plugin directory. You’ll find the current version of the plugin there (and, hopefully, only there).
Parallel to that, a new method for collecting usage statistics was implemented (including the new “ojs::counter” metric). The new metric should not match the old metric, but it should also not be empty. Some configuration may be necessary if you are not using the acron plugin. See this FAQ: My published file views or statistics reports shows no data. What do I do?
Let us know if that helps.