For those of you, like me, who ran two 5.91 SMP clients and Affinity Changer small alterations are required to continue doing so with 6.22 SMP clients.
6.22 introduces its own affinity management which clashes with Affinity Changer. This prevents two clients running simultaniously.
If you want to run Affinity Changer switch off the new feature in the advanced options of the client config.
Also in advanced options you can specify run parameters like -smp if you don't want to do it using a shortcut.
To get to the advanced options run create a shortcut to the FAH executable and edit the shortcut target with -configonly.
When you run the shortcut you will get the usual options, one of which is to alter the advanced settings.
Example: Edit the shortcut Target to:
"C:\Program Files\<<FAH Directory>>\fah.exe" -configonly
Remember the configonly shortcut will only run the config and will not restart the client.
If you want to run the 6.22 client in SMP mode without altering the advanced configuration create a shortcut to the program executable and alter the Target properties as follows:
"C:\Program Files\<<FAH Directory>>\fah.exe" -smp
Also if you set -smp in the advanced options of the client then the shortcut to run the client does not need -smp in the Target properties.