Before shutting down the MySQL server containing the InnoDB Plugin, you must enable “slow” shutdown:
SET GLOBAL innodb_fast_shutdown=0;
For the details of the shutdown procedure, see the MySQL manual on The Shutdown Process.
In the directory where the MySQL server looks for plugins,
rename the executable file of the old InnoDB Plugin
ha_innodb_plugin.dll), so that you can restore
it later if needed. You may remove the file later. The plugin
directory is specified by the system variable
plugin_dir. The default location is usually the
lib/plugin subdirectory of the directory
Download a suitable package for your server platform, operating
system and MySQL version. Extract the contents of the archive
tar or a similar tool for Linux and Unix,
or Windows Explorer or WinZip or similar utility for Windows. Copy
ha_innodb_plugin.dll to the directory where the
MySQL server looks for plugins.
Start the MySQL server. Follow the procedure in Section 10.3, “Converting Compressed Tables Created Before Version 1.0.2” to convert any compressed tables if needed.