Here is a workaround:
1) Create an account at openweathermap.org;
2) Sign-in and get you own API key;
3) Find the file "wopenweathermapapi.py" and open it with a file editor (you'll need super user privilege). You can make a backup of this file before editing if you prefer;
4) Find the line that begins with "APPID = ". After the equal sign, you'll find a 31 characters-long key. Replace this key by the one you got at openweathermap.org;
5) Now you just need to restart the application and, if everything else is well configured, it should work properly about 10 minutes after you created your account. (At least it worked for me).
Here is a workaround:
1) Create an account at openweathermap.org;
2) Sign-in and get you own API key;
3) Find the file "wopenweatherma papi.py" and open it with a file editor (you'll need super user privilege). You can make a backup of this file before editing if you prefer;
4) Find the line that begins with "APPID = ". After the equal sign, you'll find a 31 characters-long key. Replace this key by the one you got at openweathermap.org;
5) Now you just need to restart the application and, if everything else is well configured, it should work properly about 10 minutes after you created your account. (At least it worked for me).