You can mule gold between characters using the ATMA bank. You can transfer gold from a character's inventory or a character's stash into the bank and back again. This bank has one account that will hold gold for ALL of your characters. This allows you to store gold from any chacter from any version. Hence, all the gold going to waste on your dusty 1.09 characters can be better served by transferring it to the bank and then to your 1.10 characters.

To transfer, open a character and choose Bank of ATMA from the "Utility" menu. Choose the type of transfer (to or from inventory or stash), enter the amount, and click the Finish Transaction button. Gold is automaticly transfered to or from the Available Funds.