Please give me some details on your OS, such as:
sudo dpkg --status weavedconnectd
Also, could you send me your password via PM though this board? Perhaps there is some character combination that is not working properly, though I thought we tested all that. Click on my icon and then use the "Message" button.
If you want to edit the installer so that it does not hide the password while you're typing, find the file /usr/bin/weavedlibrary and then look for the line reading:
read -s password
Change this to:
and it should show the password as you are typing.