i'm using a pro version. and so far, everything is working OK. this is a great tool. however, i noticed an issue with the pagenum property.
if I do this:
[nimble-portfolio template="4colround" items_per_page="Infinity" pagenum="99999999"]
the WP ends up doing this query:
SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'portfolio' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private') ORDER BY wp_posts.menu_order ASC LIMIT 999999980, 10
the query runs OK until the LIMIT instruction.
I personally do not use pagenum nor items_per_page attributes. you may consider this post solved... but you may also want to look into this issue for future versions.