Jabref under linux-mint

[Wolfgang Engelmann]

Slightly OT:

Is there somebody who uses Jabref as a reference manager under 
Linux-Mint successfully and could give me a hint how he/she succeeded? I 
am always getting

java -jar Jabref-4.3.1.jar

Error: Unable to access jarfile Jabref-4.3.1.jar

I tried under Linux-mint 18.3 Sylvia openjdk version "1.8.0_181", and  
Java SE Runtime environment of Oracle, and have set the Path in 
/etc/profile to

export JAVA_HOME=/home/wolfgang/java/jre-10.0.2
export PATH=$JAVA_HOME/bin:$PATH

Cheers,

Wolfgang