KrushZilla
I thought a little more about your issue and realized that yours is just a common encoding issue that is known as mojibake.
I've just copied the text that you pasted in the your message above (#6):
KrushZilla Text as written is (I've also attached the file itself):
灓湩慌湵档牥㐠㈮〮സ䔊潳整楲潓瑦慷敲䰠䍌⠠⥃㈠ⴳ〲㐲簠栠瑴㩰⼯獥瑯牥捩潳瑦慷敲挮浯楗摮睯.....
into vscode with UTF-16 LE
encoding.

Then, changed the encoding to UTF-8
and got this result.

I've hidden the text as you did in your image:
but I can easily see the result is the same.
In Spine, when you click the Open log
button it just trigget the OS to open the txt file, nothing special. So, the issue is Notepad sometimes interpreting the text content with the wrong encoding.
Which language are you using in your OS?
I've also noticed you have an old launcher (4.2.08). It highly recommended to upgrade it. You can do that downloading the latest launcher from your license page.