What encryption mechanism would you recommend for this? I have some pretty low risk files in my Dropbox but I still encrypted them with a long complex password

What encryption mechanism would you recommend for this? I have some pretty low risk files in my Dropbox but I still encrypted them with a long complex password with 256-bit AES encryption through WinZIP. I've heard GnuPG is better as it allows asymmetric encryption, but this should be good enough.