ThePigwee my friend, i will now start to panic

Can someone tell me is it safe to move all coins from 1.4.1 wallet to 1.5 wallet? I transfer 1000 yesterday from 1.4.1 and i received on 1.5, but I dont know where are the backup files of 1.5 wallet when i want to save it???
Also, what will be after 21. april? Can we dan still sent from 1.4.1 to 1.5 wallet? Because i have a lot of coins, and I dont know that i would have enough time :/