We run on VHF and want to have VarAC launch with that frequency set. Not the default 20m Calling Freq.
Most of us do not have CAT for Rig Control or for PTT
i.e. no Omnirig, FLrig, hamlib etc. We simply have a SignaLink which provides a hardwire PTT when audio starts.
Therefore the checkbox for Startup using last frequency is not available.
But the feature is still available and it works. Find the VarAC.ini file and in the [rig control] section set
LastFrequencyLoadUponStartup=ON
It does just what it says.
Put the desired frequency in the list, select it, then quit. Next time you launch, it will be set.