In Switzerland, individuals are still free to download whatever files they like for their own private use (except for software and video games).
Note that uploading or seeding a copyrighted work, which was a misdemeanor under the previous law, remains illegal.
source: With P2P law, Switzerland reaffirms its commitment to privacy
All the code is GPLv3 so it will remain FOSS. There's no need to immediately switch to other apps. You can optionally fork then build the apps for yourself.