Hoster Lite 4.03.....upgrade??

[GMANN]

Hi guys,
I have not written for so long because 4.03 Lite is working so well.
No crashes, no slow-downs during database searches, ....works great!
Happy as a clam.
I have only about 2000 songs in my database. 1700 of these songs are from my CDGs that I own. About 300 of these are MP3 (zips) that I have purchased.
My question(s):
1. Should I upgrade to 4.09d?
2. Will the zip files have to be re-imported? (Thought there was some upgrade in the software that imports zips somewhat differently).
3. Do my settings (singers database, insta-buttons, etc.) transfer over?

Thanks for any insight you might be able to offer.
Computer Dell Precision M6300 Laptop
Intel Core Extreme CPU X7900 @2.8GHz
3 GB RAM