I also got a new character which I have to delete, else Offline Tools won't start since it's the character I loaded last (I guess). All was fine until like lvl 117. Guess I'll have to play without a couple items for a while. No need to delete any chars for your issue, just open MXL Offline Tools by...

I did not have Iron Golem summoned but still could not load in offline tools. I think because it was not "Unsummoned" but because it died. I think you have to re summon a dead golem then unsummon it to load in offline tools. I think "Unsummon" is the key not "Dead Golem"...

Lol, this is a funny topic to say "Confirmed"