Hello is Xojo is Working fine on Windows 7 64bits with no problems with Ports .
I think buying the version I want to be sure the web Xojo is Ok

Stand Alone

If you are asking “Do Xojo web apps run on Windows 7 x64 as standalone apps?” then the answer is yes.

yes is any port for Win or no

You may need to open ports in your firewall and keep away from those used by Windows, but there’s no restriction on which port is used.