Upgrading an existing install of SafeTP/Unix is straightforward: simply compile the binaries as usual, and then replace the old binaries with the new ones. The binaries to replace are: sftpd, sftpc, makekeys, addent, and viewkey.
Re-running the install script will re-do things that don't need to be done, which might or might not cause problems -- don't do it.
Thus, for a typical install, this sequence will complete the upgrade:
% cd sftpd-1.44 % ./configure % make % make check (optional) % strip sftpd sftpc makekeys addent viewkey (optional) % chmod a+rX * % su # cp sftpd sftpc makekeys addent viewkey /home/safetp