Hello Malte and Frank,
I downloaded around the end of June (29th) the official ]po[ Windows distribution. Then from there I got the DB and the packages.
I put the packages on top of my distribution and used the above DB as starting point.
I run some few upgrades/updates.
To replicate what I did you can get:
1. my distribution:
https://www.spazioit.com/software/Windows-OpenACS.exe
Once installed, in /naviserver/software/naviserver-si.zip you can get the naviserver sources I use
2. some material:
https://www.spazioit.com/software/po-material.7z
containing the modified ]po[ packages and DB.
It is rough material, but I hope it helps.
Maurizio