Well, after having found a way to use them without (too much) crashes
I decided to complete the series with their Iron 2
Now, after having compared the 1 and 2 versions, I can say that the latter are not so enticing compared to the 1 versions
Sure, the samples are bigger so the sound is better
And I have the Instrument mode that is a gem
BUTā¦
Like for other loop/sample-based plugins, the variety of riffs is not so high as it appears to be, with the further drawback that version 1 riffs are missed in the version 2
I asked them why, and they replied they changed something in the code, so versions 2 cannot use version 1 riffs, YUK
The problem is that versions 1 had a higher number of riffs, so this is a big loss
In other words, it seems to me that developers gave way to āsoundā and āeffectsā (some very cool indeed) compared to the number of āriffsā, and they killed the option to use version 1 riffs, that is a worsening to me, not counter-balanced enough by the better sound and the Instrument mode
the solution is so simple: buy all their products so you have everything then use the MIDI to play the riff you copied out of the v1 product to play the v2 samples LOL
Well, I have all of their guitars, apart the metal ones
But, sometimes it doesnāt work because riffs and articulations are hard-coded in the tool, not in the MIDI
but I can always try, even if I prefer routing compared to editing
As suspected, it doesnāt work: you can move chords only, not riffs and articulations
So the current situation is:
versions 1 have plenty of riffs, but so-so sounds
versions 2 have great sounds, but not many riffs
Iāll survive to it, and I can do many things with both versions, but I donāt see further improvements in possible next versions if the engines are different, if they donāt add more riffs or if they donāt sell separated riff banks
then use the MIDI to play the riff you copied out of the v1 product to play the v2 samples 
LOL