Do you got an error message? Or does the app start with an empty wine list?
The program uses the system addressbook. In Yosemite you must allow this for all apps.
Start the Mac OS system preferences. Open security & privacy and then privacy.
Choose contacts and select the check box for Wine XT.
Now start the program.
Empty wine list:
This happened when the database path is changed.
Copy your "Wine XT“ folder (backup?) to your documents folder. -> "~/Documents/Wine XT" (~ is your home folder) .
The folder must have this path. The "Wine XT" must be located in your Documents folder.