Below are the quick steps to disable ShortPoint Theme Builder on a classic page using a URL parameter, for your testing purposes.
Note: Please keep in mind that this solution works for Classic SharePoint Pages only. It will not work on Modern Pages. If you're not sure, the URL ending or containing .aspx is a sure indicator that the page is Classic.
Also, please note that this option is available for you if you have installed ShortPoint SPF Version 6.2.0.0 or higher.
1. Navigate to a classic page where you want to disable Theme Builder
Navigate to the page where you would want to disable ShortPoint Theme Builder using URL parameter in your SharePoint environment.
2. Add ?sptdisable=1 to the end of the page URL.
Append the query string with parameter name as sptbdisable and value as 1 to your page URL right after the page name.
For example, if your page URL is something like:
https://shortpoint.sharepoint.com/sites/sales/SitePages/Home.aspx
you should put ?sptbdisable=1 like this:
https://shortpoint.sharepoint.com/sites/sales/SitePages/Home.aspx?sptbdisable=1
And if your page URL is like:
https://shortpoint.sharepoint.com/sites/sales/SitePages/Home.aspx?somequery=somevalue
then you should put ?sptbdisable=1 like this:
https://shortpoint.sharepoint.com/sites/sales/SitePages/Home.aspx?sptbdisable=1&somequery=somevalue
or
https://shortpoint.sharepoint.com/sites/sales/SitePages/Home.aspx?somequery=somevalue&sptbdisable=1