I had a on file database ad then made the split. Now I need to modify some tables and ms/access 2013 does not allow to modify them either via the front end or, directly, in the back end (on the back end refuses to open the file due to "a security concern" and requires me to digitally sign the file, which I do not know how to do.
I went to the trust center and added the back end location as a trusted locations, but it did not help.
what shall I do? can anyone help?