What i understood in Main jrxml your are call Agility2.jrxml which you want to update.
To update Agility2.jrxml you are creating Agility3.jrxml now you want to have main jrxml should access Agility3.jrxml not Agility2.jrxml.
Solution : Edit the main jrxml which shows on your screen.
You will find one windows is opened
on that find resource.
On resource you will find the Agilit2.jrxml link edit that and point to Agility3.jrxml and save that. You will have main jrxml will point to latest Agility3.jrxml.
I will share the link on weekend with screenshot till than what i have written try that, i hope that will solve the issue.