Cubase 8 and macOS Sierra GUI problem

I did a fresh install of macOS Sierra and reinstall of all my software on my computer. I’m having an issue with tabbed windows in Cubase 8 since I reinstalled it - every time I open any of the mixer windows or the plug-in manager, it resizes and repositions my all my windows into tabs. It’s incredibly annoying since it totally wrecks my window layout every single time I reopen a project or simply close and open the mixer. I’m assuming it has to do with the new tabs system in Sierra but I can’t for the life of me figure out how to make it stop doing this.
I’m running Cubase 8.0.40.
Thanks for your help!
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Not sure if it helps but you could try to disable the “Open folders in tabs instead of new windows” feature in Finder | Preferences | General. Only setting that comes to mind that could cause this behavior.