Hi and Welcome.
I've been playing eurofly3 since it launched as a beta version, and landings have been fine, even at multi-runway airports.
But I left the game for months, and today I cannot land at all. I tried several times, but the plane crashed (insufficient lift).
So, Has anything changed regarding the landing?

I also had the same problem as you but I overcame it. When landing, open the flaps to the maximum and reduce the engine power to zero using an + end. After a while, the plane will land but sometimes it will also crash.

where does this happen exactly, I mean at what stage in the landing process. if it is happening at the moment when you set the engin power to 0 In the touchdown phase, check your landing gear maybe that's up. if it is happening when you are trying to set the landing speed, don't set the power all the way down to 0, make sure to maintain at least one % power.

I'M JUST TRAINING ON THE Piper_Arrow so the landing is a little different.