tried to install on Linux Mint:
this is the log. its a brand new installation. It looks a file is missing but I don't know where to find it.
Mcreator # java -jar mcreator.jar
[Fri Oct 26 17:44:47 CEST 2018] [Launcher] Java version: 1.8.0_171, specification: 1.8
[Fri Oct 26 17:44:47 CEST 2018] [Launcher] Installation path: /home/johannes/Mcreator
[Fri Oct 26 17:44:47 CEST 2018] [Launcher] User home of MCreator: /root/.mcreator/
[Fri Oct 26 17:44:48 CEST 2018] [WebIO] Reading from URL: https://mcreator.net/app
[Fri Oct 26 17:44:49 CEST 2018] Skipping update message ...
[Fri Oct 26 17:44:49 CEST 2018] [WebIO] Reading from URL: https://mcreator.net/app/motw
[Fri Oct 26 17:44:49 CEST 2018] [WebIO] Reading from URL: https://mcreator.net/app/news
[Fri Oct 26 17:44:50 CEST 2018] Failed to load import format classes! Things won't go right!
[Fri Oct 26 17:44:50 CEST 2018] java.io.FileNotFoundException: /root/.mcreator/source/1.12.2-source.jar (Datei oder Verzeichnis nicht gefunden)
[Fri Oct 26 17:44:50 CEST 2018] at java.util.zip.ZipFile.open(Native Method)
[Fri Oct 26 17:44:50 CEST 2018] at java.util.zip.ZipFile.<init>(ZipFile.java:225)
[Fri Oct 26 17:44:50 CEST 2018] at java.util.zip.ZipFile.<init>(ZipFile.java:155)
[Fri Oct 26 17:44:50 CEST 2018] at java.util.zip.ZipFile.<init>(ZipFile.java:169)
[Fri Oct 26 17:44:50 CEST 2018] at co.pylo.mcreator.java.c.a(Unknown Source)
[Fri Oct 26 17:44:50 CEST 2018] at co.pylo.mcreator.java.c.<init>(Unknown Source)
[Fri Oct 26 17:44:50 CEST 2018] at co.pylo.mcreator.java.b.<init>(Unknown Source)
[Fri Oct 26 17:44:50 CEST 2018] at co.pylo.mcreator.a.<init>(Unknown Source)
[Fri Oct 26 17:44:50 CEST 2018] at co.pylo.mcreator.Launcher.lambda$main$1(Unknown Source)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventQueue.access$500(EventQueue.java:97)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventQueue$3.run(EventQueue.java:709)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventQueue$3.run(EventQueue.java:703)
[Fri Oct 26 17:44:50 CEST 2018] at java.security.AccessController.doPrivileged(Native Method)
[Fri Oct 26 17:44:50 CEST 2018] at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
[Fri Oct 26 17:44:50 CEST 2018] at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
[Fri Oct 26 17:44:51 CEST 2018] Pylo sync status: false
[Fri Oct 26 17:44:51 CEST 2018] MCreator setup process started ...
[Fri Oct 26 17:44:51 CEST 2018] [Setup] Path for MDK zip: /tmp/minecraftforge5868930428594998883mdk
[Fri Oct 26 17:44:52 CEST 2018] [GA] Tracking page: /1.8.0/launch
[Fri Oct 26 17:44:52 CEST 2018] Exception in thread "Thread-6" [Fri Oct 26 17:44:52 CEST 2018] java.lang.UnsupportedOperationException: The BROWSE action is not supported on the current platform!
[Fri Oct 26 17:44:52 CEST 2018] at java.awt.Desktop.checkActionSupport(Desktop.java:225)
[Fri Oct 26 17:44:52 CEST 2018] at java.awt.Desktop.browse(Desktop.java:381)
[Fri Oct 26 17:44:52 CEST 2018] at co.pylo.mcreator.i.b.c(Unknown Source)
[Fri Oct 26 17:44:52 CEST 2018] at java.lang.Thread.run(Thread.java:748)
[Fri Oct 26 17:45:20 CEST 2018] [Workspace File System] - Storing workspace to the file system
Issue comments
Setup failed because you don't have proper Java and JAVA_HOME configured most likely. In such case, read this page: https://mcreator.net/install/linux
This is because the setup failed. You have been shown a big message with instructions on what to do. This happens if the setup fails and you ignore the error message.
Run the setup again, this time read the error message and press the Copy error log button on this message. Then paste the error log here so I can try to help you fix the cause for the error.