diff --git a/SleepLib/machine.cpp b/SleepLib/machine.cpp
index ad23287b..a6f17278 100644
--- a/SleepLib/machine.cpp
+++ b/SleepLib/machine.cpp
@@ -336,7 +336,7 @@ bool Machine::Save()
             Session *s=m_savelist.at(i);
             s->UpdateSummaries();
             s->Store(path);
-            //s->TrashEvents();
+            s->TrashEvents();
             savelistCnt++;
 
         }
diff --git a/SleepLib/session.cpp b/SleepLib/session.cpp
index 1da6238c..f0cd37be 100644
--- a/SleepLib/session.cpp
+++ b/SleepLib/session.cpp
@@ -740,6 +740,7 @@ void Session::updateCountSummary(ChannelID code)
     m_timesummary[code]=timesum;
 }
 
+FlowParser flowparserobject;
 void Session::UpdateSummaries()
 {
     ChannelID id;
@@ -747,7 +748,7 @@ void Session::UpdateSummaries()
     calcAHIGraph(this);
 
     // Calculates RespRate and related waveforms (Tv, MV, Te, Ti) if missing
-    calcRespRate(this);
+    calcRespRate(this, &flowparserobject);
 
     calcLeaks(this);
     calcSPO2Drop(this);
diff --git a/mainwindow.cpp b/mainwindow.cpp
index fe876110..410581e0 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -2481,6 +2481,23 @@ void MainWindow::reprocessEvents(bool restart)
 }
 
 
+void MainWindow::FreeSessions()
+{
+    QDate first=PROFILE.FirstDay();
+    QDate date=PROFILE.LastDay();
+    Day *day;
+    QDate current=daily->getDate();
+    do {
+        day=PROFILE.GetDay(date,MT_CPAP);
+        if (day) {
+            if (date!=current) {
+                day->CloseEvents();
+            }
+        }
+        date=date.addDays(-1);
+    }  while (date>=first);
+}
+
 void MainWindow::doReprocessEvents()
 {
     m_inRecalculation=true;
@@ -2496,10 +2513,11 @@ void MainWindow::doReprocessEvents()
     int daycount=first.daysTo(date);
     int idx=0;
 
-    QList<Machine *> machines=PROFILE.GetMachines(MT_UNKNOWN);
+    //QList<Machine *> machines=PROFILE.GetMachines(MT_UNKNOWN);
 
     if (qprogress) {
-        qstatus->setText(tr("Loading Event Data"));
+        qstatus->setText(tr("Recalculating Summaries"));
+        //qstatus->setText(tr("Loading Event Data"));
         qprogress->setValue(0);
         qprogress->setVisible(true);
     }
@@ -2509,6 +2527,7 @@ void MainWindow::doReprocessEvents()
         if (day) {
             for (int i=0;i<day->size();i++) {
                 sess=(*day)[i];
+                bool isopen=sess->eventsLoaded();
                 // Load the events
                 sess->OpenEvents();
 
@@ -2526,8 +2545,9 @@ void MainWindow::doReprocessEvents()
                 sess->destroyEvent(CPAP_RDI);
 
                 sess->SetChanged(true);
-                //sess->machine()->SaveSession(sess);
-                //if (!isopen) sess->TrashEvents();
+                sess->UpdateSummaries();
+                sess->machine()->SaveSession(sess);
+                if (!isopen) sess->TrashEvents();
             }
         }
         date=date.addDays(-1);
@@ -2538,10 +2558,9 @@ void MainWindow::doReprocessEvents()
 
     } while (date>=first);
 
-    qstatus->setText(tr("Recalculating Summaries"));
-    for (int i=0;i<machines.size();i++) {
-        machines.at(i)->Save();
-    }
+//    for (int i=0;i<machines.size();i++) {
+//        machines.at(i)->Save();
+//    }
 
     qstatus->setText(tr(""));
     qprogress->setVisible(false);
@@ -2553,6 +2572,7 @@ void MainWindow::doReprocessEvents()
     } else {
         Notify("Recalculations are now complete.","Task Completed");
 
+        FreeSessions();
         daily->LoadDate(current);
         if (overview) overview->ReloadGraphs();
     }
diff --git a/mainwindow.h b/mainwindow.h
index 8558c60a..dae4bb9f 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -291,6 +291,7 @@ private slots:
     void on_filterBookmarksButton_clicked();
 
 private:
+    void FreeSessions();
 
     Ui::MainWindow *ui;
     Daily * daily;
diff --git a/preferencesdialog.ui b/preferencesdialog.ui
index 6a500c2e..bd821049 100644
--- a/preferencesdialog.ui
+++ b/preferencesdialog.ui
@@ -42,7 +42,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>2</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="importTab">
       <attribute name="title">
@@ -624,7 +624,7 @@ p, li { white-space: pre-wrap; }
             <string>Shows Respiratory Disturbance Index instead of Apnea/Hypopnea Index (RDI=AHI + RERA)</string>
            </property>
            <property name="text">
-            <string>Use RDI instead of  AHI (PRS1 only)</string>
+            <string>Use RDI instead of AHI (PRS1 only)</string>
            </property>
           </widget>
          </item>