Delete the plugin’s INI file while updating and let it regenerate.
1. Extract this archive to any folder and then copy the contents to Oblivion's folder.
2. Extract Construction Set v1.0’s executable from its installer into the game’s root directory and rename it as ‘TESConstructionSetOld.exe’. [The installer can be downloaded separately from the CS wiki]
3. Open the ‘ConstructionSet.ini’ file in your ‘Documents\My Games\Oblivion’ directory and set the ‘bAllowMultipleEditors’ key’s value to ‘1’.
Instructions #2 and #3 need to be carried out only if the lip sync tool is sought after.
Since CSE is an OBSE plugin, the CS must be run through the OBSE loader [Wiki Article].
[CSE] Construction Set Extender Initializing ...
[CSE] INI Path: F:\Bethesda Softworks\Oblivion\Data\OBSE\Plugins\Construction Set Extender.ini
[CSE] CS patched !