To modify a RoofSnap estimate template, I would suggest the following.
Create a blank project in RoofSnap (no image or sketch needed and you don't have to enter any address) and go straight to the Estimates menu. Add the current version of the template.
Delete whichever items need removed and/or add any additional items (through the plus + button on Web App, or (i) info button on iPad). Once all the desired items are present within the estimate option, if you are on Web App go to the three dots menu button toward the upper right and select the Save as Template option. If you are on iOS (iPad), go to the disk icon toward bottom left to Save.
Name the new version so that you can distinguish it from the old one (for example, put today's date or 2020 at the end of the name when saving it).
If you then wish to delete the old version of the template, templates can be deleted from the Manage Templates menu under the info (i) button in the lower left side of the RoofSnap iOS mobile app (iPad/iPhone).
This menu to delete templates is currently only accessible on the RoofSnap iOS mobile app and we will be adding it to the Web App version in future updates.