Good question i get email from Thai Embassy in Hungary that i can start apply fot dtv visa now when i come back home if my planing to come back in november, reason is that same like normal 60 day tourist visa you need to entrance to Thailand in 90 days when your dtv visa is valid!!
Im planing to start proces in may of fear that will be changes in rules regrading dtv visa and send them email with few more question and thats what replay i get from them!
Mean if you dont enter Thailand in 90 days your dtv visa is aprroved it will be canceled!!