Hi all!It's been long since the last time I played FSX, however after refitting my computer with a brand new SSD and fresh install, I thought I could also upgrade from the boxed to the Steam version of FSX. I had already made a lot of research about the advantages (and disadvantages) of the latest version published by Dovetail, and bought it a few weeks ago. As obvious as it may sound, I had to have all my addon aircraft and scenery from nearly 7 years of simming into FSX:SE.For the most addons, all runs fine, however, I've experienced a few issues with some of them, particularly Tom Ruth's aircraft (DC-10, L-1011, PA 320 series, etc). These aircraft form the backbone of the fleet I regularly fly with, and I really want to fly with no problems at all, but:- When I press the SPACE+MOUSE binding, the mouse starts flickering between the crosshair and the pointer;- When pressing CTRL+Y, SHIFT+(number), Y, O, ALT, the binding not always work, as if windows switched between FSX and another program, or desktop.I've searched through the web and found out that disabling the Steam in-game overlay would solve the problem, which it did in most part, however I sporadically find myself in this problem again and again, particularly when switching from desktop to FSX. Maybe I am missing something here, and I know this can be solved, but I already posted this on Steam and got no response for almost a week... I've also heard that it may be something related to random keyboard language switching, but since the CTRL and SHIFT keys don't work I don't think so.