[Bug] Slipstream crashes on start

[JPVenson]

Hey

I tried to run the current release with jre1.8.0_311 and it just crashes.

Version:	3.10
CmdLine:	\Downloads\SlipstreamModManager_1.9.1-Win\SlipstreamModManager_1.9.1-Win\modman_admin.exe  --l4j-debug
WOW64:		yes
Working dir:	\Downloads\SlipstreamModManager_1.9.1-Win\SlipstreamModManager_1.9.1-Win\.
Java min ver:	1.6.0
Java max ver:	
64-bit search:	SOFTWARE\JavaSoft\Java Runtime Environment...
Check:		SOFTWARE\JavaSoft\Java Runtime Environment\1.8
Check launcher:	D:\JavaMuchCrap!\jre1.8.0_311\bin\java.exe (OK)
Match:		1.8
Check:		SOFTWARE\JavaSoft\Java Runtime Environment\1.8.0_311
Check launcher:	D:\JavaMuchCrap!\jre1.8.0_311\bin\java.exe (OK)
Match:		1.8.0_311
64-bit search:	SOFTWARE\JavaSoft\Java Development Kit...
64-bit search:	SOFTWARE\JavaSoft\JRE...
64-bit search:	SOFTWARE\JavaSoft\JDK...
Runtime used:	1.8.0_311 (64-bit)
Main class:	net.vhati.modmanager.FTLModManager
Add classpath:	modman.jar
Launcher:	D:\JavaMuchCrap!\jre1.8.0_311\bin\java.exe
Launcher args:	-classpath ".\modman.jar;modman.jar" net.vhati.modmanager.FTLModManager  
Args length:	73/32768 chars
Exit code:	0

19:36:32.108 [main] DEBUG net.vhati.modmanager.FTLModManager - Started: Sat Oct 30 19:36:32 CEST 2021
19:36:32.111 [main] DEBUG net.vhati.modmanager.FTLModManager - Slipstream Mod Manager v1.9.1
19:36:32.111 [main] DEBUG net.vhati.modmanager.FTLModManager - OS: Windows 10 10.0
19:36:32.111 [main] DEBUG net.vhati.modmanager.FTLModManager - VM: Java HotSpot(TM) 64-Bit Server VM, 1.8.0_311, amd64
19:36:32.193 [AWT-EventQueue-0] DEBUG net.vhati.modmanager.FTLModManager - Default look and feel is: Metal
19:36:32.193 [AWT-EventQueue-0] DEBUG net.vhati.modmanager.FTLModManager - Setting system look and feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
19:36:32.201 [AWT-EventQueue-0] DEBUG net.vhati.modmanager.FTLModManager - No ftl_dats_path previously set
19:36:32.207 [AWT-EventQueue-0] DEBUG net.vhati.modmanager.FTLModManager - FTL dats path was not located automatically. Prompting user for location

Exception in thread "AWT-EventQueue-0" java.lang.Error: Trampoline must not be defined by the bootstrap classloader
        at sun.reflect.misc.Trampoline.<clinit>(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at sun.reflect.misc.MethodUtil.getTrampolineClass(Unknown Source)
        at sun.reflect.misc.MethodUtil.access$000(Unknown Source)
        at sun.reflect.misc.MethodUtil$1.run(Unknown Source)
        at sun.reflect.misc.MethodUtil$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.reflect.misc.MethodUtil.getTrampoline(Unknown Source)
        at sun.reflect.misc.MethodUtil.<clinit>(Unknown Source)
        at javax.swing.UIDefaults.getUI(Unknown Source)
        at javax.swing.UIManager.getUI(Unknown Source)
        at javax.swing.JOptionPane.updateUI(Unknown Source)
        at javax.swing.JOptionPane.<init>(Unknown Source)
        at javax.swing.JOptionPane.showOptionDialog(Unknown Source)
        at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
        at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
        at net.vhati.modmanager.core.FTLUtilities.promptForDatsDir(FTLUtilities.java:157)
        at net.vhati.modmanager.FTLModManager.guiInit(FTLModManager.java:211)
        at net.vhati.modmanager.FTLModManager.access$000(FTLModManager.java:33)
        at net.vhati.modmanager.FTLModManager$1.run(FTLModManager.java:86)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)