You should burn a new SD with the latest image. Use good quality SD cards. Sandisk Ultra and Sandisk Extreme normally work fine for me.
Although the image include a good collections of soundfonts and a bunch of demo snapshots, you could keep the old SD for reference. Perhaps there is something interesting you want to restore later.
Hi I did the update using a Sandisk Ultra;
after update, the list o sf2 files in http://zynthian.local/lib-presets is empty.
Furthermore after uploding sf2 files when I save a snapshot the name of SF2 file has no name:
Presets empty? All engines or some of them only? Try to run the “search for plugins and presets” button from the LV2 page…
Did you “restore” snapshots from the old SD?
If you do so, some of them may not work if using soundfonts or presets not included with the image. You should restore these too.
Anyway, I would suggest leaving the restoring process for after. First you should play a little bit with the software out-the box.
I can confirm the same issue in testing version. FluidSynth engine see and working with sf2 files at making new channel. WebConfig don’t show sf2 files in Presets & Soundfonts.