Please try this testing method (from the readme.txt):
To verify that the plugin is working properly, do the following:
1. Visit the "Your Info / More Info" panel in the plugin's settings
2. Click on each of "Your feed URLs" and refresh the settings page
3. In the "Tools and Options" panel, click "clear cache"
4. Refresh the settings page
After performing these steps, your "Current Feed Stats" and "Total Feed Stats" should both display some numbers, based on the feed URLs that you clicked in step 2. This means that the plugin is working using its default settings. Similar testing should be done for other feed-tracking options. Note that not all tracking methods (or browsers/devices) work for all types of feeds; for example, the "Alt Tracking" method is required to record hits for RDF feeds.