Allow installation on a removable device
Version 6.2 provided for installation on a removable device. I use that as a backup and a means to have my work passwords accessible without merging them with my personal passwords on my phone. Which is why I haven't upgraded. I don't need, or want, them in the cloud. Earlier versions also supported multiple emails with separate password repositories on a single device and that was removed at some point I don't remember which version.
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Herbert Hedberg commented
I feel that a USB stick with app and data is the best way to protect these data... by having the database physically off-line except for the 30 seconds that I need every month or so to remind me of a password I've forgotten. This way, my data is in my pocket most of the time instead of on my laptop all the time!!