Display Email Passwords with Crack

I recovered my company internal password from my Thunderbird email client using a password crack program. After traveling, I found I had forgotten my password. I could still get my email because my password was stored in my email client. I Google'd for an email password crack program, found one at NirSoft, downloaded, scanned the download for viruses - none - installed and ran the program. To my surprise my passwords stored in Thunderbird were displayed within 2 seconds. This is no slight on Thunderbird because:

• The NirSoft software is made to crack many email packages such as Outlook Express, Microsoft Outlook, and others.
• To properly secure my Thunderbird passwords, from Thunderbird, I selected Tools/Options/Privacy and set a master password to encrypt my passwords. Now the NirSoft software cannot display my passwords, I'm safer.
  

This was an eye opener to know how not safe my passwords were, and now are more secure.