"Attention Pilots!
Update 4.006 will probably be released on Tuesday May 19th (tomorrow) if all goes well. If not, we’ll try again on Wednesday. So back up anything you want backed up before you attempt the update. This will be a big one, maybe
backup your entire IL-2 install folder
just in case. Update servers will likely be jammed for a while so please have a bit of patience with us. This update is JAM PACKED with good stuff. We think you’ll like it a lot."