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"Last Download Location" breaks Thunderbird Profile

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CCleaner Version: v5.31.6104 (64 bit)

Thunderbird Version: 52.1.1 (32 bit)
OS: Windows 10 (64 bit)


How to reproduce:

- Close Thunderbird (if open)

- Backup your Thunderbird profile data from C:\Users\<Username>\AppData\Roaming\Thunderbird\Profiles to a secure location

- Run latest CCleaner with "Last Download Location" checkbox enabled in Thunderbird application settings

- Open Thunderbird


What happens:
- Thunderbird cannot access existing profile data and shows first startup wizard (no "broken profile files" info or anything)

- Profile data is still there but somehow corrupted, Thunderbird still references correct profile folder but cannot "see" it for some reason

- As soon as you overwrite profile data with your backup, everything works again


The new "Last Download Location" setting somehow corrupts Thunderbird profile data.

I checked with only this setting enabled, it is definitely the cause of the problem.

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Be sure you've tried the patched version which should make sure this doesn't happen again (will not magically recreate your profiles though sorry)

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