Ok I just got Dark Avatar the other day so I am slow to know what the known problems are. I have read through most of previous posts and yes I did use the "search" function so if it has already been brought up please forgive me.
Now my issue is this. When I decide to upgrade a single spacecraft or I decide to upgrade my entire fleet all existing ships turn into the basic core fighter model. The game takes the credits and I see the little wrench icon showing its upgrading but all I end up with is a fleet of base core unit models. Also when I save a game (that didn't get corrupted) and return to it all my ships again are basic core models. I am forced to play the game all the way through since if I save and return I usually get wiped out from having just basic defender models.