I have an issue when i try to import demo in the theme installation 
 
tools -> import and when i upload file i go to demo data folder i have multi page folder and one page folder which one should i open to select the xml file to upload it 
and if i choose multi page folder or one page folder and upload the content.xml file it will give me that error 
 
Are you sure you want to do this? 
 
please help me as soon as possible