CCleaner 5.63.7540 crashes on Tablet running Windows 8.1 Pro and desktop W8.1Pro

CCleaner 5.63.7540 crashes on Tablet running Windows 8.1 Pro and desktop W8.1Pro

Both have BitDefender Internet Security 2020 installed on which Cleaner has been configured on the Firewall both for ccleaner64.exe and bdpatcher.exe with FULL access

Have tried to uninstall - rebooted - reinstalled - still crashes

Then tried to uninstall - reboot - install previous version on tablet - still crashes

Any fixes please

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