Major release changes of tinyMediaManager need some manual intervention by the user.
v4 to v5
With the release of v5 we decided to do not offer a direct upgrade path from v4 because of massive changes inside tinyMediaManager itself. In the upgrade instruction of v5 you will find detailed information how to upgrade from v4 to v5.
v3 to v4
A direct upgrade of v3 to v4 is not possible - but you have two options to upgrade your v3 installation to v4. In the upgrade instruction of v4 you will find detailed information how to upgrade from v3 to v4.