after the game updated do i have to restart in order to go throught and unlock everything cause i dont have an option to do much or even know who the potion vendor is its been while
If you played in one of the past 3 patches, you shouldn't have to restart. Simply save your game in the old version in the MC's bedroom. When you open the new version, click on the blue save disk icon and select the version your old save is on. That should fix your save for the new version.
The potion vendor can be unlocked from day one, just go to the town square (the town area that has the fountain) and look for the door you can click on.