Hi,
We are sorry for your inconvenience. We update our plugin on a regular basis. Maybe you have missed the updates. Kindly follow our changelog for the plugin change log: https://themewinter.com/eventin/#change_log. We have also worked on the multivendor solution in the first phase and are also working on the second phase. Kindly check tomorrow's update for the multivendor solution.
If you report the bugs, we will take immediate action to fix all of them.
Regards