Cat Jumped on Keyboard !!

I was installing eM client and my windows live mail was being imported when my cat jumped on the keyboard and managed to stop the import !
I couldn’t find a way to restart the import so I uninstalled and re-installed hoping that the import would start again but it didn’t ! I assume because I hadn’t deleted the mail wherever that is stored? 
Could someone advise me on How to start the import again please
thanks