Hello, I just spent the last hour trying to find some solution but I failed, unfortunately. The FTP lister position is not saved no matter what I tried.
Perhaps an AREXX script could help telling the DOpus to open the FTP in the already opened lister instead of opening it in a new lister. But still, that would require an extra clicks. First you open a local folder - which opens in your preferred size and position - and in this folder you double-click an Arexx script which in return connects to an FTP using the very same lister.