If you do not wish to use this port you don't have to, but there is no setting option to do this simply.
If you really need to change the port then you must change the server details in Remote Monitor as:
Note: servername can also just be an ip address. eg 188.8.131.52:300
For VRS you must be logged in as an Administrator user and edit the registry using RegEdit and add the key:
HKEY_LOCAL_MACHINE/Software/NCH Swift Sound/VRS/RemoteMonitor
Add a string value:
with a value of the port (ie 300 say)
You can also create a file port.reg using a text editor (Notepad for example). Copy the text below into the document and save it. You can the run the reg file by double clicking on it in Windows Explorer.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\NCH Swift Sound\VRS\RemoteMonitor]