Hi,
We didn't change anything regarding the module display because HikaShop 2.6.4 and the 3.0.0 and as far as we know, Advanced Modules Manager works perfectly fine with the 2.6.4, so I suspect it should be the same with the 3.0.0 without the need for any modification on either parts.
Did the problem occured after the update of HikaShop ? I suspect it doesn't come from the update but it just an issue with how the module is configured. And without knowing more on that we won't be able to say much in that case.