Quote from: Hendrik51 on October 06, 2019, 06:47:53 PM

Before I try all that, is there any way to find my backup phrase via a different route than opening the Jaxx Depktop version? I mean, for some reason it won't open but there has to be a way around it to still get to my backup phrase?

AFAIK Jaxx no longer open source, so i don't see way to extract backup phrase from files generated by Jaxx.

Quote from: Hendrik51 on October 06, 2019, 06:47:53 PM

If not, then can you please tell me if the menu "view" and then "Toggle Dev Tools" could be of any use?
Will I be able to access my private keys or backup phrase via there maybe?

If such option/menu exist, then you should see option to view or dump private key, seed, mnemonic or backup phrase.

Quote from: Hendrik51 on October 06, 2019, 06:47:53 PM

And last but not least: would it hurt if I go to the official Jax website and download the newest version (even though it should have already downloaded the newest version automatically I would assume)? Will it still recognize my old wallet after this or am I completely locked out then and there is no way anymore to restore my wallet? I'm a little scared to try this option.

I wouldn't do that, unless there aren't any option and Jaxx support/community can't help you