Cool! Today I forgot to file my flight at VATSIM. As a result of this the old flight was imported in MSFS window. So far my mistake, no doubt. But there was no way to reset the SimBrief window in MSFS. I signed out, now I cannot sign in. While I was restarting Simulator completely it crashed (probably not your problem), I am trying again, which will take several long minutes, praying to be able to sign in SimBrief again. It´s starting to look that
for a small mistake of mine I will not be able to fly today at all.