I confirm, select-options are just internal tables (with header Image may be NSFW.
Clik here to view.) so you should be able to add much more data, did you try to use the right lower icon "upload from clipboard"
Image may be NSFW.
Clik here to view.
NB: But for such a number of entries, don't use a IN range option in a SQL WHERE option as you may overflow maximal size of SQL statement allowed in database. (Use a TRY/CATCH/ENDCATCH to check it or let the program generates a dump then look at syslog with SM21)
Regards,
Raymond