First of all, you should open the Run window by pressing the ‘Windows’ key along with the ‘R’ key together. After that, you need to enter the path in which your QuickBooks entitlement information exists. Furthermore, you should click on the ‘OK’ option. QuickBooks error 3371 Here, you will come across the Windows Explorer where you need to right-click on the ecml file. Doing so will get you a ‘Delete’ option that you should select it. Once done, you should close the active window and then give a restart your QuickBooks software. Take assistance from the experts if you are running into any kind of problems.