>>23netDb is now a folder with assorted router.dats
reseed is done by [reseed] in i2pd.conf you can reseed from a .su3 .zip or floodfill
not disabling [reseed] in the i2pd.conf before relaunch forces a reseed again and again tl;dr its all shitware yswv
i tried
~ zip seed.zip -j -0 $datadir/netDb/*/*.dat
[reseed]
verify = false #not needed for reseed.zipfile probably
zipfile = $path/seed.zip
and it worked
you can probably just shutdown the daemon replace netDb then relaunch