When I opened Minecraft for the first time it transfered the worlds into the new location. 

I play a while but stop since it was night and I was gonna sleep.

I open the game after I wake up then the game asked me to log in.It was fishy so I checked the Minecraft folders .the folder is empty,the only ones remaining are the folders and the new files created (the settings file) 

The screenshots show the aftermath of the bug.

Every folder on the Minecraft directory is empty (even the resource_packs folder is empty)