Select the app you wish to lock then tap the lock button.
Head over to the left menu in KeepLock > Settings > Change Password.
Ensure that you have installed the latest KeepLock version then tap on the lock icon. Tap on the icon located in the upper right corner to proceed to the "Forgot Password" page. Tap "Send verification code" and enter the code sent to your recovery email, then proceed to "Reset Password".
Yes, KeepLock will automatically lock your apps when you restart your phone.
Yes, you can enable/disable the locks anytime.