Drop down menu width

[alienrat]

I've purchased a theme from hidden techies, I have contacted them asking about modifying the drop down menus. I had found a way to modify my drop down menu as it was long and scrolling to the right, way off the page. I changed it, and I can't find where I managed to change it. But now my drop down menu is on the page but way too wide.

I am not sure that this was on the prestashop or on the hidden techies theme. I'll attach a screenshot which I sent to HT, my site is not accessible because it is on an internal development server. Hiddentechies customer support are not helpful at all, they are just asking me for all my site login details, but won't answer my question which is getting very frustrating.

Anyone had this issue and can tell me how to fix my menu?