Below are the error message I got on my web page. It seems to me that the plugin is accessing a nonexistent table. I checked my database and that table “vs_ahm_user_download_accounts” does not exist. I just updated the plugin to version 3.1.22 and the problem is still there.
WordPress database error: [Table ‘vsdev.vs_ahm_user_download_counts’ doesn’t exist]
select download_count from vs_ahm_user_download_counts WHERE user = ‘1’ and package_id = ‘1139’