I've installed version 1.8.13 under Linux Mint 20. I the first session everything seems to work OK. However, after rebooting the PC the IDE fails to open - the small splash window appears briefly but then just disappears. This has happened twice now so the behaviour appears consistent.
The uninstall.sh script doesn't appear to do anything but if I manually delete the .arduino15 directory from my home directory and re-run the install.sh script then the IDE will run for that session.
Any assistance with diagnosing the problem would be welcome as I'm a newbie to both Arduino and Linux.
Picked up JAVA_TOOL_OPTIONS:
Set log4j store directory /home/phil/.arduino15
Incorrect IDE installation folder: Your copy of the IDE is installed in a subfolder of your sketchbook.
Please move the IDE to another folder.
That looks fairly straightforward for me to solve I shall reorganize my directories and re-install.