Sorry about this but it seems that since this issue and my "reset" I have lost the link between EOPKG and the softs I've previously installed.
Let me explain : for example, I've LibreOffice installed but the 184.108.40.206 version and if I search for LibreOffice in the Software Center I can see that the last version is the 220.127.116.11.
Moreover, I have the "Install" button instead of "Update" (always in the example of a LibreOffice already installed).
Same thing with several apps (even Software Center itself).
How can I "rebuild" this link between EOPKG and what's already installed ?
Thank a lot in advance !