Password protect profile

[Admini]

@CentBrowser:
Firstly, thank you for your reply.

A correction: I actually use the "Person 1" instead of Guest profile.

Now I signed my Google account and Cent synced my settings. I've forgotten that I've uploaded all my settings to Google server for sync. :

Cent still can't read to records in Login Data, except from Google account. Obivously, this is credential issue. Anyway, my passwords already in my mind and archieved. 

I just noticed that import & export to password list of Chromium. It's useful.
chrome://flags/#password-import-export     -> Enabled    
chrome://settings-frame/passwords
More details.

***

Off-topic:
Sync progress changed my other search engines. On my Google account stored settings is old. I didn't remember. And I selected everything. I mean the Autofill was selected too. Therefore, on Google account old SearchEngines overwrited to  my Web Data file in HDD. And now a laundry list. I manually revert to original Web Data file from my backup. Cent fianlly reached fresh my search engines but sync is broken. Need relogin. If I relogin for sync, Cent override Web Data all old entries from Google Account. However, I don't select Autofill, settings.

I still use the --cb-disable-auto-detect-search-provider. I think this switch doesn't work/override to the Search Engines in the sync progress. Because of Webforms/AutoFills and search engines keywords stored within same file(Web Data).

How can I disabled turn off other search engines on the sync progress? Maybe need new a switch? --cb-disable-sync-search-provider, like.

You can manage Sync settings by checking "Manage Cent Browser Sync and personalization Settings" in the signing dialog, which shows after you log in your Google account.
But seems there is no item called "Search engines settings", you can try turning off "Autofill" to have a try.

For the Login Data issue, are you using portable version?
Portable version can keep all data among any computer, installer version can't do it.