Step 1) To Check Instagram accounts with browser in GramDominator you need to visit: Account--> Accounts Manager
Step 2) Right Click on "Setting" Under "Action"
To Check Instagram Accounts you need to click on "Setting" Under "Action". Once clicked a modal window will Popup and Then Click On Check
It will automatically check your account is working or not and will give the status as success or fail under status. Getting trouble in checking accounts contact support.