Step 1) To Delete Accounts in GramDominator you need to visit: Account--> Accounts Manager
On this screen you will find 3 buttons :- Load Accounts, Add Single Account, Delete Accounts.
Step 2) Click on "Delete Accounts"
To Delete Instagram Accounts you need to click on button "Delete Accounts". Once clicked a modal window will Popup and you can select whether you want to delete all accounts or you want to delete Non-working Accounts
Select From Delete Options and click on Delete.
Getting trouble indeleting accounts contact support.