I have them dating back to 6 on my daw.
Noooo Problem.

I Have X3 and Platinum - Works Great....

Cactus Music

Kev999
Make sure you install the different versions in the right order, i.e. earliest first.

This.. not sure exactly why but it's been quoted many times here. 
 
 

Because you don't want the chance of overwriting newer versions of shared files with older versions.  Plus, it seems logical to go oldest to newest as one would do in practice as newer versions are released.
 

As a rule, the installers are smart enough not to overwrite newer files. The only problem I recall since the introduction of the X series is an issue with the QuadCurveEQ getting overwritten when X1 was installed after X2/3. Still, if possible when performing anything on than an advanced install of a few plug-ins, it makes sense to install SONAR in release order, oldest first.

Guys,
 
Thanks for all the responses!! Again, I like Professional, but when I compose, I like to use the Staff View. However, in Professional, there is no snap feature in SV, so let's say I'm trying to make a simple 4/4 hi hat on each beat. I follow the 'directions' given in Professional (moving the now time, etc), and even though I simply go 'click, click, click, click' on each beat (the one, the two, the three, and the four) and even though the notes LOOK like they are 'in place' at the correct position, when I play them back at least one of them is off by a 32nd note. When I zoom in, sure enough, the note is off and I have to fix it. I never had this problem on my LE version as you could pick quarter note snap and every note placed perfectly. That is why I am interested in using LE to compose drum and bass tracks, then bring them over to Professional to record guitars and vocals. I believe that the piano roll view has a snap to grid feature. I just don't know why they would get rid of it for the staff view, unless I am missing something. I admit I am not as technically proficient at this as most of you are. I try to make music that is somewhat 'raw' and not as produced (think Mahavishnu Orchestra) so there are many features with which I am unaware. If anyone has any suggestions on how to better use the Staff view, I am more than open to hear them.
 
Thanks again, my friends!!
Jim
 
Music should go right through you, leave some of itself inside you, and take some of you with it when it leaves - Henry Threadgill