apt-watch error

["Nuno Vasconcellos" <caminada@hotmail.com>]

Hello,

Sometimes when apt-watch runs, it pops up a window with the following error 
message:

Archive directory /home/user/.apt-watch/archives/partial is missing

After that, apt-watch taskbar icon turns into a red icon with an X, possibly 
indicating that it failed to work.

How can this be fixed?

Thanks.