It's easy to configure plugin.
If you can't connect to your mysql server from Internet you should make backup and restore mysql database on your PC.
1. When can I find log file?
You'll find plugin log file FoxNetSoft.Plugin.Import.Magento_log.txt in App_Data folder.
2. I see the error message in plugin log file
Error. ReadEntitySetting. MySqlException=Host '*****' is not allowed to connect to this MariaDB server