How to remove chat history for a single contact from Skype?

This post is going to be a little strange compared with other posts on this blog.
In order to test some functionality on a web application I had to change the calendar date in future on my local machine.
In the while, I was using Skype and conversations were recording as of being on 8th of August (the date I experienced this). Then I return 'back from time' on current date. Well, from that time on Skype was behaving weird because it showed me conversations ordered by timespan ascending.
Well that is when you will got messed up :)

As Skype only allows you to delete all history conversation at once I had to search for a way to delete only those conversation that were 'in future' so Skype will show me last chat discussions on last row ;)

Searched around and found this solution.(it will require a little knowledge of SQL)

1. Quit from Sype - required - otherwise you will have a sql error - database locked
2. Go to C:\Users\PROFILE NAME\AppData\Roaming\Skype\SKYPE LOGIN ID and make a backup of main.db
   
3. Go to http://sqlitebrowser.org/ and download the exe and install it on your machine.
4. Go to: http://www.onlineconversion.com/unix_time.htm and get current timespan. - you will need it for sql query
5. Open  SqLite and then go to OpenDatabase and choose the same database mentioned at 2)
6. In order to make sure what you want to delete you could execute the next query   

• SELECT * FROM "Messages" where timestamp > '1406808732'   (for timestamp you could put the one obtained at 4)  or if you want to check of an author use: author = 'authorId' ) authorId is skype Name

 If you are happy with the results that you see then execute same script with delete command:

• DELETE FROM "Messages" where timestamp > '1406808732' --or use: (author = 'authorId')

Note that you could also filter the results by author/from_dispname or other columns of same Message table. AuthorIds could be taken from Contacts table and then skypename column .

Cheers.