Thank you all for the posts and replies.
Sorry for the bugs, looks like there always is something to fix. Once we have gathered a number of issues and fixed them we will release an updated version.
The "white information text" on the screen is the DEBUG we use while working and editing the game. We forgot to switch it off, sorry. But you can easily make it disappear by pressing the NumPad "." key (also CANC/DEL) in the right side of the keyboard. That will cycle 4 modes (ON/OFF/partial/no pop-ups). Otherwise, you can also edit the HUDData file inside the FLIGHR folder. See the picture below.
As for the exploding planes and CTDs, YAP RW (as the original YAP3 was) is not designed to play random missions, but only to be played within the inluded, manually edited missions. As far as we know, those issues happen because if you try to generate a random misson, the game engine looks for objects which are not included in the package and then crashes. Exploding planes are also caused by the game, which puts an aircraft over another on the runway, making them crash before starting.
If the mission starts in the middle of the jungle or just nowhere, is because in YAP there are many more "airfields" than in the stock game, but some of them are fake. They are in fact cities and this trick was made to make them light up at night and enhance the night experience. As you can see, there are a few restrictions, caused by the fact that the 1st and the 2nd Gen of the game are not fully compatible, but if you just play the 102 included missions you'll be fine.
Tha's why we also obscured the "Campaign" button, which also caused the game to crash.
Thanks.