Upgrade From 3.6.1 To 3.8.3
 

I have a forum running 3.6.1 that I am going to soon have updated to 3.8.3. The hosting company does our upgrades as part of the monthly fees. They are pretty knowledgeable on VBulletin but as you can see it has been a while since we have upgraded. Is there anything to be aware of that I should pass on to them or should this be pretty smooth? Even though I have faith in them I would rather be safe than sorry so I thought I would ask. Thanks in advance.