Fix bug causing an error when the sum of squares of stats exceeded 0x7FFFFFFF. And:

Restore file extension pq.
Bump version to 6.4 (6.3 wasn't officially released but has been used in ports.)
Turbo mode for testing.
Limit the number of fancy items won to keep the Invetory not too huge

Main.pas

@@ -1,8 +1,9 @@
 unit Main;
-{ copyright (c)2002 Eric Fredricksen all rights reserved }
+{ copyright (c)2022 Eric Fredricksen all rights reserved }
 
 {$DEFINE CHEATS}
 {$UNDEF LOGGING}
+{$DEFINE TURBO}
 
 interface
 
@@ -12,14 +13,16 @@ uses
 
 const
   // revs:
-  // 5: pq 6.3
+  // 7: pq 6.4
+  // 6: pq-web
+  // 5: pq 6.3 (no official release)
   // 4: pq 6.2
   // 3: pq 6.1
   // 2: pq 6.0
   // 1: pq 6.0, some early release I guess; don't remember
-  RevString = '&rev=5';
+  RevString = '&rev=7';
   wmIconTray = WM_USER + Ord('t');
-  kFileExt = '.pq3';
+  kFileExt = '.pq';
 
 type
   TMainForm = class(TForm)
@@ -719,11 +722,13 @@ begin
     if SubItems.Count < 1
     then SubItems.Add(value)
     else SubItems[0] := value;
+
+    Selected := true;
+    MakeVisible(false);
   end;
   //list.MultiSelect := true;
   //list.RowSelect := true;
   //list.HideSelection := false;
-  list.Items[pos].Selected := true;
 end;
 
 function LevelUpTime(level: Integer): Integer;  // seconds
@@ -835,10 +840,13 @@ begin
     t := 0;
     for i := 0 to 5 do Inc(t,Square(GetI(Stats,i)));
     t := Random(t);
-    i := -1;
-    while t >= 0 do begin
-      Inc(i);
-      Dec(t,Square(GetI(Stats,i)));
+    if t < 0 then i := Random(Stats.Items.Count)
+    else begin
+      i := -1;
+      while t >= 0 do begin
+        Inc(i);
+        Dec(t,Square(GetI(Stats,i)));
+      end;
     end;
   end;
   Add(Stats, Stats.Items[i].Caption, 1);
@@ -863,7 +871,9 @@ end;
 
 procedure TMainForm.WinItem;
 begin
-  Add(Inventory, SpecialItem, 1);
+  if max(250, Random(999)) < Inventory.Items.Count
+  then Add(Inventory, Inventory.Items[Random(Inventory.Items.Count)].Caption, 1)
+  else Add(Inventory, SpecialItem, 1);
 end;
 
 procedure TMainForm.CompleteQuest;
@@ -1100,7 +1110,7 @@ begin
       else WrLn( '  ' + Indefinite(Items[i].Caption, GetI(Inventory,i)));
   WrLn;
   WrLn( '-- ' + DateTimeToStr(Now));
-  WrLn( '-- Progress Quest 6.2 - http://progressquest.com/');
+  WrLn( '-- Progress Quest 6.4 - http://progressquest.com/');
   Result := f;
 end;
 
@@ -1226,6 +1236,9 @@ var
 begin
   gain := Pos('kill|',fTask.Caption) = 1;
   with TaskBar do begin
+    {$IFDEF TURBO}
+    Position := Max;
+    {$ENDIF}
     if Position >= Max then begin
       ClearAllSelections;
 
@@ -1337,7 +1350,7 @@ end;
 
 const
   KUsage =
-    'Usage: pq [flags] [game.pq3]'#10 +
+    'Usage: pq [flags] [game.pq]'#10 +
     #10 +
     'Flags:'#10 +
     '  -no-backup     Do not make a backup file when saving the game'#10 +
@@ -1610,6 +1623,9 @@ var
 const
   flat = 1;
 begin
+  {$IFDEF TURBO}
+  Exit;  // For testing multiplayer saves without hitting the server
+  {$ENDIF}
   if FExportSheets then
     ExportCharSheet;
   if GetPasskey = 0 then Exit; // not a online game!