Using the Register View, forms from the same template can be deleted in bulk.
Deleting Forms via the Home Folder:
Click on Home Folder
Select the Template Library tab at the top of the screen
Click into the middle of the required template (not selecting the checkbox)
Select the forms you wish to delete using the checkboxes on the left-hand side of each row
Note: You can select all forms by clicking the checkbox in the top, on the left-hand side of the Register View
Click Delete Selected
Deleting Forms via a Team Folder:
Click on the relevant Team Folder
Select the Templates tab at the top of the screen
Click into the middle of the required template (not selecting the checkbox)
Click Register
Select the forms you wish to delete using the checkboxes on the left-hand side of each row
Note: You can select all forms by clicking the checkbox in the top, on the left-hand side of the Register View
Click Delete Selected
Bulk Deleting Forms Video Walkthrough: