What ADE version should I use on Mac to open ACSM files?

[jean-pierreb86579809]

I had ADE 2.0 that did not open the ACSM files.  I have installed ADE 4.5 and it does not open them.

If I uninstall ADE, will I loose the books that already have on my computer?

Then what ADE (for Mac) should I install?

[Nanaky]

Can used 3.0 or 4.0. Both should work under Mac.