Bad news
Even the 64 bit windows version just refreshes the page and doesn`t give any error upon uploading the file and entring my main password (I think the wallet/blockchain password)
Multibit doesn`t give an option in the tools page for importing private keys as people say it does. It only give an option to recover a wallet by recovery words of 12.
I`m sorry but do you have Any other solutions?
Which version did you use? Try using the classic:
https://multibit.org/release-info/classic/v0.5.17.html And did you try this conversion tool:
https://bitcointalk.org/index.php?topic=610555.0