My Name won't change!

[cuteasaurr]

I Changed my username and when i log in to MINECRAFT it says "no familiar with Minecraft.net" Now i am sad is this happening to everyone or just me help!

 

[cuteasaurr]

HELP!

 

[DragoJoeYM]

Reinstall Minecraft , or just delete your .Minecraft folder . if that doesn't work please do tell me .

 

[Booneh]

I had the same problem lol
Just on the launcher click "Switch User" on the bottom left corner of the launcher and logging with your new name.