Thousand Arms (PS1) Sprite Submissions

[Barack Obama]

I don't think Jarfix is the problem here, I would deinstall / reinstall Java itself.

Jdk24 (Java Development Kit), which is just the regular Java that the tool uses:
https://www.oracle.com/de/java/technologies/downloads/

If deinstall / reinstall doesn't work here, I have no solution for this.