The easiest way to configure FTN95 is to type
FTN95 /config
on the command line. The result is FTN95.cfg and this can be placed 'next' to the compiler for global effect or in the local project folder for local effect. 'next' may mean different things depending on your operating system. On my 64 bit Windows 7 it ends up in C:\Users\Paul\AppData\Local\VirtualStore\Program Files (x86)\Silverfrost\FTN95.
By default FTN95 is not configured and this state is recommended if you are using Plato or Visual Studio or if you are deploying on a network.
The Plato ini file is in fact plato3.ini. This is produced automatically by Plato and holds the user options etc. Some information is held in the registry. By default the Plato ini file is also placed 'next' to Plato.exe but there is also an option for this file to contain only the full path for a preferred location. This can be useful in a network environment.