With this test. Go to the help window, debug window-console, put on the command line ""dumpprivkey " " without quotes or parentheses.
If everything goes right you back your private key. Well, now go to the Roaming folder and rename the folder talkcoin by talkcoin1, don't touch nothing more.
now do a clean installation with the latest version, Now go back to the debug window-console and on the command line you write importprivkey [label] [rescan=true]
where you put the private key that has given you before and in "label" if you put a name to the address.
Now you must synchronize everything correctly, leave although this does not seem to work.
If this does not solve the problem, try to reinstall Microsoft Frontend 4.5 and C++ 2012 Redistributable 11.0.50727