Simply remove the one you have (apt remove amsn) and download this one and install it by clicking on it in nautilus (the filebrowser). It will tell you that a later version is available but don't worry about that, just install it. When mintupdate offers a new version don't accept it - simply uncheck it and wait until a later version than 0.97.20070524-1 is available.
This was compiled on a 32 bit system so if you have installed a 64 bit kernel you will probably have to compile it yourself.
To do it from the command line:
Code: Select all
apt remove amsn
sudo dpkg -i amsn_0.97.2-1.deb
I'll let you know when it's ok to install it via mintupdate. In the meantime, this should get you back online