Random Redirect plugin how to add random page functionality?

Under 2.7 with the Tarski theme, I used the hack posted by Alan Edwardes on his blog.

The hack originally works for posts, but it appears that changing

WHERE post_type = 'post' AND post_password = '' AND post_status = 'publish' ORDER BY RAND() LIMIT 1");
to
WHERE post_type = 'page' AND post_password = '' AND post_status = 'publish' ORDER BY RAND() LIMIT 1");

does the job on my blog here.
The link to the random page is https://www.locworks.pl/11/random/

Best regards,

Piotr