Do you have hands other than holdem tournament hands imported in this database?
If so, you should see the other sections listed in the status bar - try running Database > Housekeeping with the ReIndex and Rebuild Cache options in addition to the defaults. If you have a large database this may take some time.
In a large database an export can take some time as well, but I wouldn't expect it to take so long to start that you feel the need to abandon it - it may appear to be frozen initially, but it shouldn't take long to start working visibly.
Your final set of issues is more concerning - what version of PT3 do you have? (see the title bar of PT3)
If it isn't v3.11.6 Beta please update. In fact, it may be worth running the installer again to make sure you have all of the up to date files.
Also make sure that you have the latest drivers for your graphics card - there shouldn't be any display issues with current versions of PT3 if everything is up to date.
If you still have trouble please
report your problem - your logs should give us an indication of what is going on.