If you use Cloudflare to manage your web presence, you can use StickyFolios either with StickyFolios-generated domain names or by bypassing the domain or sub-domains you are using for StickyFolios.
Custom domains include subdomains (apps.mysite.com) and main domains (mysite.com).
If you are using cloudflare and want to use custom domains you would need to set Cloudflare to bypass the DNS records you are using in StickyAlbums/StickyFolios.
Edit the records in cloudflare by accessing the DNS settings in your Cloudflare account. How to Access the DNS settings Cloudflare.
If you have any questions about how to set up your Custom Domain while using Cloudflare, please contact email@example.com.