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Using Jamroom
You could delete it from the file system
/modules/jrSiteBuilderConstructionKit/
Not sure of the exact module name its been a long time gone. What slightly concerns me is if your site is using it then you won't want to delete it.
Site Builder used to be 3 or so modules then got combined into one module. If you had both of them on the site that could cause issues.
Might be better to copy it to a local folder rather before deleting so it can be restored.
If you want to send admin level user info to support at jamroom dot net I can take a look.