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UNINSTALLATION VIA OPEN IV PACKAGE INSTALLER:
(will make it as simple as possible)

Open OpenIV, go to the "tools" tab, click on "Package Installer". 
Double click the OIV file "UEFA (UNINSTALL)" and then click "install" and "install into mods folder". 

!AFTER! : 

OPEN "UNEDITED ANIMS_CLIPSETS" LOCATED IN "MANUAL UNINSTALL" FOLDER AND READ "UNINSTALLATION NOTES.TXT" TO REVERT ANIMS/RELATIONSHIPS.DAT TO ORIGINAL FILES
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