After no response on this for years, and realizing that the plan I was on cost more for fewer features than if I were a new customer (they added new features to new plans with lower prices, but kept me on the old plan), I decided to jump ship and move to a competitor with more features for a lower price. When I called to ask about it, the person with whom I spoke was polite, but didn't seem interested in keeping me as a customer even though I'd been with them for nearly 15 years and given them thousands of dollars. So I left.
My new solution costs less and has the ability to share files (and is actually free for 1 on 1 meetings and free for group meetings up to 40 minutes). It doesn't necessarily have all the bells and whistles that G2M does, but it has what I need.