Thumbnail plus "Include subfolders in results" + pager

Hi,

in the Thumbnail Plus tab, I
1. unchek "Include subfolders in results"
2. use the pager to display another page
-> "Include subfolders in results" is always rechecked when landing on the new page.
-> if I uncheck it, the browser is reloaded and I'm back to the 1st page...

Can someone help me with this issue ?

Thanks.