I have installed version 3.0.3 of the plugin. I have never used it or any of its predecessors before so should not have any legacy code.
After I activated the plugin, I clicked on the link to give me my list of Pages, so that I could experiment with the shortcodes.
However I got the following fatal error when it tried to draw the page, the column headings were also unfamiliar:
Catchable fatal error: Object of class WP_Error could not be converted to string in C:\xampp\htdocs\wordpress\wp-content\plugins\page2cat\page2cat_class.php on line 129
The column "Archive Link" has been added to the list of columns that I would normally expect to see.
When I deactivate the plugin the page returns to normal.
It is reproducible, reliably.
This is on a local installation and webserver where I test changes before putting them onto the production site. I can supply screenshots if required.