New additions, scripting updates, lots of bug fixes, and more.
When 158 starts if there's a plugin installed that has a variadic parameter it causes construct to issue a "Oops Something went wrong error, but there's no way to close that window to uninstall that plugin or update it to a new version. So it makes the entire construct unusable.
Roll back to r157, uninstall or update it, then switch back to r158. Addon developers should have published updates to their addons by now.