I am in transition from J3 to J4. Using 4SEF according to your suggestion everything was done with no problem. Now I have the new site in J4 and still the old tables of sh404sef in the database.
I have used previous shURL for many articles in J3. Now we need to continue generate shURL in J4. Is it safe to install 4SEO to 1) import the old shURLs and 2) to generate accordingly the new ones?
Regards