We are using the soon to be released Direwolf20 1.3 pack, you have to download it as a private pack (uper right in luancher) using the code Iwanttorestartmyworld, then scroll to the bottom of the mod pack list and you will see a second direwolf20 1.5 (ver 1.0) pack. Do not use the Direwolf pack listed at the top of the modpack as that is the 1.12 ver and will not connect as the mods are out of date.
No, everything should be as set defualt in the Direwolf20 1.5 (ver1.0) mod pack. If you get an "Out of Date" error with no mods listed, just try logging in again till you connect. That seems to be bug in the pack, maybe the fix they are waiting for before release.