When 2nd Edition was released
I wrote up a fairly long review that focused largely on the changes between 1st & 2nd Ed.
The system is still recognisably 45 Adventures, but it's cleaned up and streamlined. The biggest change is that instead of "d10 +this -that" it's now a "fistfuls of d10" game, where you generally add or subtract whole d10 instead. So what used to be a "+1 bonus" is now a "+1d10 bonus".
The heroes are tougher, the mooks are more fragile but more versatile.
And lately I haven't been playing it at all, having been distracted by other things!