1. Should I upgrade to 4.09d?
You can always try the Demo.
2. Will the zip files have to be re-imported? (Thought there was some upgrade in the software that imports zips somewhat differently).
This is posted on the Hoster upgrades page. It was done from version 4.04 on. You can view all the upgrades Here:
http://www.mtu.com/upgrades/hoster.h...ec6d09362#409d
NEW
Batch Convert KMA HDZIPs in Songs Database - For new features coming such as crossfading. Hoster 4.04 no longer directly
plays KMA HDZIP format files. When Hoster 4.04 runs, the HDZIP to HDMP3G Converter requests to run if any HDZIP files are found in your Songs Database. Once you approve converting these, let continue to the end. A flag is then set that tells Hoster that all HDZIP files have been converted.
- REMOVED Playing ZIP and HDZIP Files Directly - Preparing for new features, Hoster no longer plays ZIP or KMA HDZIP files. Use the Import hard drive files screen to import ZIP files as KMA HDMP3G Type files that will play. You can also manually unzip your files to MP3+CDG pair files and play them with the Audio button.
3. Do my settings (singers database, insta-buttons, etc.) transfer over?
Yes