I believe that exporting backups is still being worked on, as is printing, and (AFAIK) this is the case across platforms. However, if you, like me, absolutely must be able to print, here's a short-term stop-gap fix until the official fix gets rolled out: Printing, priorities as numbers instead of color-coded stars - FIX(ish).
Up until a few months ago Producteev had a great, simple backup to .CSV feature. But they have removed it. So I guess that means you should not expect it to come back any time soon. But when they bring out the PAID upgrade, then you will get it back. The basic option is free, but the good features will gradually be removed so that you have to upgrade. That's business, so we can't complain.