notes on importing registry values:
if you have 2.02 installed, the passwords for each line are in plain ASCII, and the same type of key as the rest of the line settings.
if you have 2.03 installed, the passwords for each line are in hex, different keytype, so the icon is different.
*IF YOU SWITCH VERSIONS* from 2.03 to 2.02 the registry values in hex (in fact, many regkeys) are *not* removed by the
uninstall program and have to be manually removed or changed if needed. The switch the other way may have the same problem;
*remove* the incorrect keys for ProxyPassword at least for each line or Express Talk will very probably get confused.
Mine did. Badly.
And the proxy servers didn't like it at all.
Still bashing at my IP problems, I have STUN tunneled through the firewall, and I'm now trying to force the port on the STUN
server reply (or how ET interprets it) back to something under 50,000.
OOk.
Bob the Animal, back to tilting cannon at windmills. 
P.S. Experimentation works better if you leave the "default line" info blank, as it waits to bounce wrong info off the SIP providers
until you re-import the values. Have fun. 