After pressing this button will be renamed originaldatafile to
<name of file>.bak and than will be saved last
data from program. This .bak file is for person who made some mistake and
want return back their data or for case of crash machine in time of saving
data. If you need data from .bak file, you must delete the datafile
and then raname datafile.bak do datafile (hofpoints.dat.bak to
hofpoints.dat)