How to clear Skype chat history?

It seems that in the Window version of Skype, there is an option to clear chat history. It is supposed to be Tools > Options > IM & SMS > Clear history button but effectively nothing similar is here:

This option is not present on the version that come with my Ubuntu 13.04. In the privacy settings there is this option:

and somewhere in the Skype forum it is said that changing that to Disable History and then restarting Skype will get rid of the chat history. Tried that, don't work.

Searching a bit I found that you have to eliminate some file in the Skype directory; I did that from the directory I have:

cd $HOME/.Skype/my_skype_name/ 
rm chat*.dbb user*.dbb 

...still no go. Before I get rid of all the .Skype directory and re-configure all Skype, is there anyone that know how to do it? The content of the directory is:

alert2048.dbb       chatsync             httpfe           msn.db-journal
alert4096.dbb       config.lck           keyval.db        msn.lock
bistats.db          config.xml           keyval.lock      profile16384.dbb
bistats.db-journal  contactgroup256.dbb  main.db          sms512.dbb
bistats.lock        dc.db                main.db-journal  transfer256.dbb
call256.dbb         eas.db               main.lock        voicemail
callmember256.dbb   eas.db-journal       msn.db           voicemail256.dbb

Removing all other *.dbb doesn't work, either.

Lesson: never put sensitive data on a Skype chat.

Solution 1:

I was instructed by Skype customer service to do following:

1. Go to Options -> Privacy and set "Keep chat history for.." to Disable History, then sign out & sign in.

2. Go to $HOME/.Skype/my_skype_name/ and delete only main.db. Sign out & Sign in.

It worked.

Solution 2:

I'm running Linux Mint 17, and was able to clear the chat history. But you won't like the answer.

First I tried expunging all of the data in the ./Skype directory. Didn't help, as everyone above has pointed out.

I have Windows XP installed in an Oracle VirtualBox VM. I installed Skype in the VM Windows, then went to Options -> Privacy and set "Keep chat history for.." to Disable History.

Anyway, after deleting the old chats using the Windows installation, I went back to Linux Mint, started Skype, and guess what, folks? --no chat history.