Steven ZahmThe 4.8 and 4.8.1 versions do not seem to make sense. Connections never had those versions and CSV Import is only at version 2.1.1.
Is that the WordPress version??? I asked about the Connections and CSV Import versions. Maybe it will be easier for you to screenshot the plugins admin page on both the old and new.
To delete all entries from Connections, there is only the bulk delete tool on the Connections Manage admin page. How many entries do you need to delete?
If you have access to phpMyAdmin or similar tool in your web host and you know how to safely use it. You could clear/truncate the Connections tables. This method is not recommended unless you really know what you are doing.
Having you tried the solutions I provided in my previous reply? Often these along correct import issues.