Can anyone explain to me what exactly does Non-proportional and Proportional mean in relation to Audio Snap edits?
 
I worked on different material trying to get a grasp of what it's doing with either method. Just can't figure it out.

Yep, that's what I thought. No one can explain it either!! : )

Where are you seeing "Non-proportional and Proportional?" I've never encountered that option in all my years of working with AudioSnap, so yeah...I have no idea what it does!

 
Non-proportional vs Proportional stretch refers to the action of moving a transient marker when multiple markers are selected.  The videos demonstrate the stretch types:
 
Non-proportional:

 
Proportional:

 
 
Hope this helps,
-- Ron

Nice job Ron. Never knew this.

Mmm...always thought is was the opposite, that proportional would keep the same spacing (proportion) between transients, as non-proportion would be to move it freely. Oh well.... 

I am of the same mind as slyman, sans my dislike of the Habs 

hockeyjx
I am of the same mind as slyman, sans my dislike of the Habs 

Aaaah....that's another thread......
And from what I've seen so far this season, I may change my avatar soon....

Proportional stretch means that each moving selected marker moves less the closer it is to the direction of movement.  That behavior may not be clear with only 3 markers selected. 
Here is a better example with 4 markers selected.  Notice that the 2nd selected marker moves more than the 3rd selected marker as the markers move to the right.
 

Got it. Thanks for the clarification.