Linux: I have experimented with the above-mentioned suggestions for a "32b prefix", whatever that is. So far, this has not resulted in me being able to run Lackey -- or any other Windows executable that I tried. (So the problem is prolly in my Linux, and/or lack of my understanding; not Lackey.)
Windows: Over the past week, I've played my first 3 games (and started / saved a 4th), across w10, w8.1 and wXP. This all worked without too many unexpected glitches; very smooth indeed, after one gets used to it all.
For my first trial games I went up against Carter, and "play mates" from my local group -- Latro (from Vienna), B'Linna, and Ias.
It strikes me that at first, Lackey's bulky interface, at first, looks like a cross between Netscape and Very Intimidating
but after a short while, most things actually start feeling very intuitive. Then there are some things that really seem hidden, so you discover them way later -- like pressing SHFT (not CTRL!) to select multiple cards.
But my classification is, supposedly, ENGINEER. (I'm a technician. So of course I don't need to first RTFM.
)
Bottom line: I've prolly been the most reluctant novice when it comes to Lackey, but even I could get off the ground with it. To me, that says something about how easy it is, and how well it works! Not bad for a build from years ago...