Is uninstall absolutely necessary?

Palm OS

Is it really necessary to uninstall the previous version of the phrasebook if you are installing an updated (bug-fix/minor update) version. For example, if you go from China2Go v3.0.0 to v3.0.1 or v3.0.2. I am not referring to going from let's say v3.0.0 to v4.0.0.

I don't mind uninstalling it if it is absolutely necessary/required but I find it a nuisance to re-enter my registration information each time especially since I purchased Asian Pack for the PalmOS and I have to re-enter my registration information for 4 programs (Cantonese2Go, China2Go, Japan2Go, and Korea2Go).

Don't the old files get over-written by the new files if the old files remain on the device when I install the newer version?

I'm referring to the PalmOS version of your phrasebooks.

Thanks.

reinstall

Usually just install the new version will overwrite the existing one. But sometimes the system may failed to do so.
You can try to not uninstall it first. If after installation everything works fine, you don't need to uninstall it.