Plugin Store re: SketchUp v7 ?

[3D Modeler]

It has been a while since I have been in the SketchUcation Website.
As of today, I "finally" installed the SketchUp Plugin Store Extension.
I didn't know I needed it or that it would be as useful as it really is. In fact, it appears "really" useful and a real time-saver.

So I did download and install it in my SU 8 Pro.
Now I have 2 Important Questions (to which I was unable to find answers in this Forum).

QUESTION #1 (with a couple related sub-questions).
I am wondering if this feature can also be installed in SU v7 Pro ?
And if so, are there any differences (i.e. is it the same version of plugin/extension) ?
And if so, does it determine which plugins/extensions are suitable for that specific version of SketchUp ?

Finally, while browsing through my plugins, using the SketchUcation Plugins Manager, I noticed that notes regarding each installed plugin where visible at the bottom of the Manager Window which are specific to each plugin (such as who created the plugin etc).
I noticed that it said that the "sketchup.rb" plugin "should be removed from the Plugins Folder" to prevent some issues.
So I did that too.

QUESTION #2
Should the same file (sketchup.rb) also be removed from SU v7's Plugin Folder as well ?

Thanks in Advance for any help to these questions.
I appreciate any and all help with these matters ... before I go and do something with either version of SU that I might later regret !!

Chris Mowat aka SnowTiger aka 3D Modeler