Can you batch edit ticket classifications?

Greetings,

I was wondering if there is a way to batch edit ticket classifications? we imported some tickets using the import tool, but we imported them with the incident classification instead of service request. I created an automation rule to apply the workflow to automatically promote any tickets classified as incidents to service request, but i then read that automation rules dont apply to imported tickets. 

Help! 

thank you in advance,

Larissa K.