You've requested for support more than a year ago.
Meanwhile because your support period has expired and you want to avoid renew it, it doesn't mean that the support attitude is not good.
Follow the support terms and conditions from Envato market, first of all.
Something so basic as adding a custom field in the signup form is not allowed by this plugin. Please review this functionallity is basic for many businesses.
UMP system has over 20 field types available from the beginning (more than 2 years), more than any other Membership system ever.
Like it can be clearly saw into Demo website where multiple SignUp fields are provided as an example:
It can not be said that UMP has no option on this case.
In the big picture, the plugin works well and has some good functionalities. Nevertheless, some small features are still missing (like the ability to store first and last name in Mailchimp or to block an entire forum in BBPress automatically), some other features are difficult to understand (like the login/logout menu if your theme is not compatible or how to custom the register page). I was also disappointed by the support: they are extremely vague and slow to respond even if I did read the documentation and did my own tests. I can recommend this plugin, but it can be improved to be perfect! Thanks.
If a WP Theme affects the WP Menu without being managed by any other scripts this a negative approach but UMP having an alternative way to restrict Menus also, once none other membership scripts provides that, it is a big plus. Definitely that should not disqualify the system instead.
The support stats, provides an average of 26hrs response time for your requests, which may be considered a good one besides other support services.