Hello Ton,

despite the fact that the author is Nicholas from Akeeba, the library is not used by Akeeba products.

It is safe to remove the version from 2016 (which you can see is 10 years old).

Before you do that, though, I would suggest you unpublish the Administrator Module of type 'J2Store Administrator Menu'. You can re-publish it after you update J2Store.

All right Ton,

access your database and run the following queries:

(replace 'tada' with the database prefix of your site)

Unpublish all J2Store modules:

UPDATE `tada_modules`
SET `published` = 0
WHERE `module` LIKE 'mod_j2store%';

Disable all J2Store plugins:

UPDATE `tada_extensions`
SET `enabled` = 0
WHERE `type` = 'plugin'
AND (
`folder` = 'j2store'
OR `element` LIKE '%j2store%'
);

That will give you the hands on the site again.

Then update j2store.

OK, the cleanest way is to do it from the Joomla administrator console so that extensions are removed properly from the database.

Run the queries I gave you previously and try uninstalling the 2016 version of FOF again.

Then update j2store.

All right Ton.

1. run the database queries.
2. go to the Joomla administrator console and uninstall the version of fof dated from 2016.
3. update j2store.