CCleaner 5.42.6595 Pro / Windows 10 / Chrome Version 66.0.3359.117 (Official Build) (64-bit)
My routine is simple: I keep Chrome open all day and close it before using CCleaner at the end of the day.
Since updating to CCleaner 5.42.6595, various Chrome profile settings (sync, zoom, download preferences, bookmark bar and more) have to be reset every time I restart Chrome.
I have just closed and restarted Chrome without using CCleaner and all the profile settings are unchanged.
I have close Chrome and used CCleaner before restarting Chrome: Chrome sync, zoom, download preferences, bookmark bar, etc... have default back to their default setting and need to be reset to my profile setting.
I have not changed CCleaner settings in ages, so this points to something new or changed in CCleaner 5.42.6595.