Thanks for the information. The missing button is a known issue that was fixed in 3.3.2 mp5. There is a workaround that can be provided by support, but you will need to open a support ticket for it. It requires some delving into the database, which if done without the direction and assistance of support would void your support contract.
When you create a support ticket, let me know the case number through a private message. Reference bug number 2928062 when you create the case as well, and that the bug has a workaround. I would suggest making the subject something like "Requesting known workaround for bug #2928062".