As I said in the title, after the last update - 4.15.7- pokertracker does not show the graphs for the hands played before the date of last update (this month) ---- It says "Loading..." ---- and I can hear the harddisk working. It shows graphs for "today" or for "yesterday" or for "since date x.12.2018" (x is a day after the update) perfectly. I mention that , at this latest update it did a database update or something .. that tooked some time.
Update: It shows the "Last month grap" but .. after a long period of loading time...
What could be wrong?