The documentation states a Dokan menu, “Top left,” is available for the Sell Dashboard etc. This is not an option in the plugin. You missed this? Anyway, it's false advertising and I will seek a refund from PayPal if you do not fix these bugs ASAP. I'm finding a long list of bugs and it's clear this plugin was not ready to be released yet.
You do understand that menu and menu positions are only available on the theme and it's a theme feature? That's why we provided the theme also and it has the positions. Not sure which things you are calling bugs.