To prevent your popups showing on specified (or multiple) pages:

1 - Go to the edit/settings screen of your campaign,

2 - In the section « where to show the popups? », check the box « Exclude some pages? »

3 - In the text input that appears, enter the path of your page like this :

/folder/page.html or /long/folder/name/page.php

To exclude multiple pages, just give the paths separated by comma "," Like so:

/folder/page.html, /folder2/home.php

PS: If you want to not run the popups on the homepage of your website, use /SITE_INDEX.

Popup targeting options