[mort 1]

I just noticed on my quick mission builder list that my Yak 1 (not the bis) no longer exists. Does anyone out there have any idea how this happens? I have all my folders and in my mission files I have a Yak 1 folder but when I try to start the mission the game obviously cannot find this aircraft. I do not use the unified installer but I suspect that when I added a new mod/plane to my list something was omitted when the game realigned the alphabetical list of allied planes. Any help would be appreciated. :???: