Re Upgrading Microstudio to 4.000

[NYTEHORSE7]

I have 2 questions.

1) The computer I have connected to the internet has Microstudio version 3.004 on it. If I upgrade from 3.004 to 4.000 will I lose the 800 or so song files I have loaded into 3.004 ? If so, can I somehow save the song files (now in 3.004) and transfer them to version 4.000 rather than re-inputting them all again from CDG discs ? I ask this because it appears that downloading 4.000 will automatically uninstall 3.004 before installing 4.000.

2) My second computer,not connected to the internet, has version 2.611 on it. I plan to use my second download of 4.000 to install 4.000 on this computer probably via memory stick or cd. I've read on these forums of several problems re conflicts with 2.611 when trying to install another version. Would I be wise to delete 2.611 manually, then download 4.000 as a new program to this computer ? Next I would ask the same question I asked in #1 above. Can I somehow save the song files I have in 2.611 to transfer to the new 4.000 instead of having to reinput them from CDG discs ?

Thank you for any input you can give me.
NYTEHORSE7 Jerry