Licensing

Been trying to contact corporate sales for several months but they never reply to emails and the automated emails are useless at this point. I originally bought multiplicity and later upgraded to the PRO version. Now I need a lot more computers and am interested in the 50 computer version (would even take a 75 or 100 computer version). However, I see nothing about upgrading and only see where I have to buy an all new license. Also, the product order page is woefully limited and it doesn't mention if I can use multiple computers to control the 50. With PRO I can flip the switch on my primary computer and make it a secondary, then flip the switch on a secondary in another room and control everything from there. Not the ideal solution, but it works. With the 50, it doesn't mention if you can do that.

Here is what I need to know:

Can I upgrade from KVM Pro to a 50 computer version or do I have to purchase an all new license?

If I can't upgrade and have to buy a new license, can I use the 9 PRO and the 50 together?

Is there a bigger version than 50?

Can I flip primary and secondary between several computers in the 50 computer version?

Thanks.

This is unrelated to the above, but trying to search on the forums grinds to a halt. A simple search can take five minutes to complete. Not sure if it is something on my end or the forums themselves.