I am a little new to linux. I had the same problem, and this resolved it for me :
1- I did like previous post, except I replaced libwxbase3.0-0-unofficial with libwxgtk3.0-0-unofficial (since this was the error I had)
sudo apt-add-repository 'deb http://repos.codelite.org/wx3.0.1/ubuntu/ trusty universe'
sudo apt-get install curl
curl http://repos.codelite.org/CodeLite.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install libwxbase3.0-0-unofficial
sudo apt-get install libwxgtk3.0-0-unofficial
2- I downloaded deb package from
http://sourceforge.net/projects/moneymanagerex/files/moneymanagerex/Version%201.1.0/mmex_1.1.0_amd64.deb/download
(this is the version I chose, there are others)
3- install using ubuntu software center