Does it require to install software on my computer, or there is possibility to login online?
It's a very very small .exe file.
It literally takes seconds to download and install.
I assure you there is nothing malicious in it.
Please let me know if you are still interested.
Thanks,
PC.
I believe that you have good intentions, but even if there isn't any malicious software, for sure there is something that i don't like..

Good luck with your idea!
A very small .exe file??
WARNING!! small executable files are the No. 1 sign of a RAT(remote access trojan). RAT files are usually 23kb-100kb in size, with crypters it can be 1MB-5MB.
If your computer is infected with a RAT, the person who created it will have complete access to your computer. The 'hacker' can access ALL your files, download virus and destroy your computer. The OP is probably trying to steal your wallet.dat file with this scam.
I will suggest ALL OF YOU TO STAY AWAY FROM THIS THREAD.
MODS PLEASE DELETE THIS THEAD.
It's been a months since lot of people using the file you're saying and until now there's no issue nor any people concerning about their computer get destroyed.