[Xymon] Where does xymon store info on currently blue servers?

I restarted xymon and apache after emptying /usr/local/xymon/server/tmp, among other things

A few minutes later, received a cascade of messages because every signle server that had been signed out was now signed back in.

Where does xymon get the information, on restart, about what is currently signed out? Is that stored in the server's tmp dir?

(if not, what could have happened to cause everything to be signed in? )

thanks Betsy

(losing the battle to keep xymon in production here, and this did not help)