KlatsQuestions and answers
Students can’t connect
Most often it is one of these:
- A different network. Your computer and the students’ PCs must be on one network. Guest Wi-Fi often keeps devices from reaching each other, so join the same network as the class. If the computer is on several networks, pick the students’ one in Settings → Network.
- The firewall. On Windows, the installer lets the students’ PCs connect. If the school runs another firewall or antivirus, allow Klats in it. On a Mac, if macOS asks about incoming connections, click “Allow”. On Linux with a firewall turned on, open Klats’ port in it.
- A busy port. If another program already holds Klats’ port, a warning shows at the top of the window. Enter another number in Settings → Port and restart Klats.
- A typo in the address. Students must type the address exactly as on the board, with the number after the colon, if there is one.
Where are tests and results kept?
On your computer, in Klats’ data folder. Nothing goes to the internet.
- Windows:
%AppData%\Klats - macOS:
~/Library/Application Support/Klats - Linux:
~/.local/share/klats, or$XDG_DATA_HOME/klatswhenXDG_DATA_HOMEis set
To keep a copy of everything or move the data to another computer, use Settings → Backup.
How do I update Klats?
Download the new version and install it like the first: on Windows over the old one, on a Mac by replacing Klats in Applications, on Linux with the new .deb package or the new AppImage file. Your tests and results stay where they are.
How does Klats know about a new version?
Once a day, Klats asks GitHub whether a new version is out. Nothing about you or the school is sent, and nothing is checked while a test runs.
When a new version is out, “New version” shows at the top of the window, with a link to this site. Klats never updates itself.
To stop the checks, turn off “Check for updates” in Settings → About.