Last week I release a minor update to the CSV Import addon which first checks to see if the library is available before trying to use it. Perhaps you will be able to import now without using an older version. I suggest updating the CSV import addon and give it another go.
If that does not work, I am emailing you an older version which should. I you need to use it, first deactivate and delete the installed version. Then you will be able to install the version I have emailed you like you normally would any plugin.
Let me know if you do not receive the emailed version.
Hope this helps, let me know.