@Ste_95: In the case of these hacks, yes, you can (in fact, you should) use the uninstaller from the latest version. (And you don't need to uninstall the SS hack to upgrade it, that's just for the JB, BTW).
As we said, for these hacks, there's an info.txt dropped in the appropriate folder (linkjail, linkss, linkfonts, usbnet) with the dogtag of the hack

.