Changes (as compared to 11.11) include:

Bug fixes:
* Autocomplete would sometimes hang or crash while editing stored procedures
* Export table data as SQL generated an incorrect create table in the 64 bit version
These were introduced in v11.0

Miscellaneous:
* Support for the client side ‘cleartext plugin’ has been removed as SQLyog is now compiled with a new client library which does not support this feature. Note that this has only relevance for users using PAM authentication with an Oracle Enterprise server. It is not relevant for the users of the freely downloadable servers from Oracle or any ‘fork’ such as MariaDB or the Percona Server.

Downloads: https://www.webyog.com/product/downloads/
Purchase: https://www.webyog.com/shop/