I am evaluating the software. I went on your site to do a custom CSS file. I chose “skyblue” just to see if your customizing of styles would work when it gave them all in one file.
What I found out was the menu (haven’t tried them all) didn’t work. Messing around with it in my code, I then went and tried it in one of your example menus you get when downloading the menu zip.
Found it didn’t work there. So I took the samples css first load it for my test page. That worked with CSS but the arrows where missing. So then I copied the sample images and applied them to the test page I was doing and the arrows appeared.
So, it doesn’t seem the customizer tool is working properly.