Install app for SharePoint: The file exists

If you have the below error in Visual Studio when you try and debug a SharePoint App:

Severity Code Description Project File Line
Error  Error occurred in deployment step 'Install app for SharePoint': The file exists. (Exception from HRESULT: 0x80070050) [AppName]  0

You have properly already tried:
- Clean the solution
- Manually uninstall the solution
- Upgraded the App version number
- Retracting the solution

If none of the above works and you are pulling your hair for a solution, try and run Visual Studio in Administrative mode.

This have fixed the problem for me many times and i think it was time to share it :-).

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