You can run using the command line first. You don't need to run -detachdb more than once so run it from the command prompt.
You can start the client with the -datadir=
e.g.,
bitcoin-qt -detachdb -datadir="D:\btcencrypted"
It doesn't reveal any private keys. It does reveal IP addresses, etc., so if that's sensitive, try to just copy the couple lines relevant to the error.