I fully agree with Jean.
Can you please produce a version that you can actually use or give back 3.7.
If there are problems with navigation widgets (order, sibling pages in vertical menu and so on….) if there are missing features that where so well done in sitefinity 3.7, if most of core functionalities of basic CMS are not working, How can you expect that now suddenly you can start new projects with this half-done product.
Give back possibility to purchase 3.7 licenses until next year so we can at least get new clients and start delivering project properly.