We are on 402D
We have several running worflows, some of which will first be completed
many, many moons from now :-)

I have tried to grasp what the manual say about upgrading to 4.5.

What I fail to understand is this.

Should I install a new postgresql database, should I keep the old one?
or,should I upgrade the binaries.

All in all, what should I do in relation to the database?