You must manually remove the plug-ins from the Tools menu if you no longer want to use them.
Help -> About... -> Librairies...
- click on a file in Plug-ins
- close SH3D
- delete the plug-ins

These old plug-ins do not benefit from the improvements and corrections made to SH3D-5.3.
The new plug-in is included in a compressed folder to be replaced more easily in future updates.

As stated here , safeguards have been put in place to avoid any confusion in the interactions between parameters.