There are 3 colors that an issue can have.
Red if the Issue has gone up in value
Black if the Issue has no change in value
Blue if the Issue has gone down in value.
Yes, one of the CB 2017 databases (or backups). The most current would be the best.
I believe the default database location is: C:\Users\(your-logon-id)\Documents\Human Computing\ComicBase Databases.
It would be easiest if you unzipped and copied the CB 2017 Database (or backup) there.