In the lower right corner of YInformer you will see a Bot Status section.  That will let you know your bot's (ID you logged into YInformer with) current status in case if it gets logged out.

Extra:

This is simply informational to let you know your bot's current status.  You will however notice that when you scan, you will see your bot log out and then log back in.  This is normal as it refreshes your bot to ensure that it is returning the most accurate results.