Lost localization after upate


I just updated Q&A plugin to version 1.1.7 and suddenly my localization was lost. My localized files were inside the plugin folder. Is this wrong? Where should I store them to make sure they’re not deleted during updates?

Update: I already tried copying the qa-pt_PT.mo and qa-pt_PT.po files to /wp-content/languages and still get the pages in english…

Thanks in advance,