O jogo nao abre (game is not open)

It appears your profile save files is corrupted (this file only has a bunch of settings data like controller mapping, settings, etc) 

locate: \Documents\Klei\DoNotStarveTogether\client_save\profile 
copy this file somewhere else (as a backup)
delete the original file
run the game

If this does not resolve the issue, then restore the file and let me know. If it resolves the issue then delete the backup file.