Definitely not Jane's, and not any of the Ace Combat titles... If the game is lost or forgotten, maybe the game is really lost and abandoned?
Almost no games are "lost". Almost every game that saw commercial release has an entry on
MobyGames and some dedicated person posting Let's Play videos to YouTube. We can narrow it down. But we need you to help.
1. How did you start it?
Did you type a command into DOS? Click on an icon in Windows? Insert a disk into your Amiga?
2. Did it display a company logo when it started?
About half of all flight simulators in the 1990s were published by
MicroProse.
Another common publisher was
Electronic Arts, although many games used their own variation of the logo.
3. How colorful was it, and what resolution did it run in?
At the start of the 1990s, pretty much everything ran in 320×200 pixels. Some games were using 16-color EGA graphics, some of the newer ones were 256-color MCGA. Early games that used MCGA often still showed signs of the artists working in 16 colors and then adding a few gradients, like
F-15 Strike Eagle II here.
As MCGA became standard and artists got more confident, colors became more subdued. The screenshot below is from
TFX.
During the mid-1990s, games started supporting 640×480 SVGA. This screenshot is from
Jane's Combat Simulations: ATF - Advanced Tactical Fighters. I acknowledge you said it's not Jane's, but this was an easy screenshot to find.
4. What were the sounds like?
You mention "Some cutscenes or weird screams if you crash during take-off". Was there speech, during cutscenes or in flight?
5. How did the menus work?
Dynamix games tended to be full of text menu options, like this one in
A-10 Tank Killer.
Others drew rooms where you click on people or objects to do something. The Wing Commander series made extensive use of this, but weren't the only ones. These are from
Jump Jet / Harrier Jump Jet by MicroProse.
As the 1990s progressed, there were often too many options to draw coherent rooms for all of them. To try and retain some atmosphere, simulators would use text menus but dress them up to look like the buttons and switches from the aircraft you were flying. This is just from the
installer for Jane's Combat Simulations: ATF - Advanced Tactical Fighters.
6. What were you offered in those menus?
Were there single missions to select from?
Was there a campaign?
Was there a mission builder?
7. Could you select your plane?
MicroProse made a lot of simulators where you flew one specific aircraft, like
F-117A Nighthawk Stealth Fighter 2.0. However, you would probably remember the name of the aircraft if it were right there in the game title.
Some get even more specific, with
Megafortress giving you a specific customised B-52 from the novel "Flight of the Old Dog".
Dynamix games like
Aces Over Europe had a few aircraft but I think the career mode always chose your plane for you.
Evasive Action had a few different types, but spread them across different time periods.
Birds of Prey had 40 different aircraft!