Algodoo

You can prevent that from happening again by doing the following:

1. After you made all your favorite settings in Algodoo, using your File Explorer locate the file named "config.cfg" in the Algodoo directory and make a copy of it but rename the copy to something like "config_save.cfg". Save it in the same Algodoo directory. That's it!

2. If you ever loose your settings for any reason, just go the the Algodoo directory again but this time create a new "config.cfg" by copying your saved "config_save.cfg" to it. Then the next time you launch Algodoo, it will have your saved settings!

If you don't think that you can do this by yourself, then ask someone else to do it for you who knows their way around computers.