Move to another site

Hello.
I just moved my download files to another wordpress subsite. (I used “Tools > Export” and then “Tools > Import”) Everything looks okey in my new admin and also in Download Manager. All files seemes there.
But when I try to download live it doesnt work. It wants to download a .txt file. How do I make the shortlink to work correctly in my subsite? Is it something in settings?
/Anna