Hello User,
It is not possible to add the ShareThis buttons on specific pages or to control where buttons appear on WordPress post (location on a page) from ShareThis WP plugin. But you can achieve this by manually adding the ShareThis code to your selected pages if you have access to your website code.
You can get the ShareThis code with instructions from here –
http://www.sharethis.com/get-sharing/
Select Website as “Platform” and then Buttons as a “Style” and then follow the instructions to get the code.
Manual installation can be done after removal of previously installed ShareThis Plugin from WP.
You can also refer the below forum link –
http://support.sharethis.com/customer/portal/questions/943449-display-buttons-on-some-pages-but-not-all-pages#sthash.7vnoNk44.dpbs
