is there a way to import the ftp accounts from filezilla to dopus?
No not directly. The Opus addrress book is stored as an xml file in the ConfigFiles folder of "/dopusdata" directory. You could perhaps access the FileZilla addresses and manually edit and add them to Opus. But, it's probably just as easy to add them in the traditional way using the GUI in Opus.
Just had to ask, would have kicked myself if it turned out it was possible, adding over 60 ftp accounts manually isn't fun