SSRS 2012 web.config caching issue

I modified/saved C:\Program Files\Microsoft SQL Server\MSRS11.MSSQLSERVER\Reporting Services\ReportServer\web.config to use 

FORMS authentication instead of windows authentication.  However, after restarting SSRS using Windows control panel, SSRS is still using the original unmodified web.config with Windows authentication.

I tried restarting the SSRS windows service via control panel to no avail.

For some reason SSRS is caching the old version and not seeing my new web.config.

How do you get SSRS to recognize new my web.config?

SSRS2012

Windows2012