after reopening the settings, the last tab will be shown.

ARKBreedingStats/Form1.cs

@@ -62,6 +62,10 @@ public partial class Form1 : Form
         private bool reactOnSelectionChange;
         private CancellationTokenSource cancelTokenLibrarySelection;
         private bool clearExtractionCreatureData;
+        /// <summary>
+        /// The last tab-page opened in the settings.
+        /// </summary>
+        private int settingsLastTabPageIndex;
 
         // 0: Health
         // 1: Stamina / Charge Capacity
@@ -2031,8 +2035,10 @@ private void settingsToolStripMenuItem_Click(object sender, EventArgs e)
         /// Displays the settings window.
         /// </summary>
         /// <param name="page">The tab-page displayed first</param>
-        private void OpenSettingsDialog(int page = 0)
+        private void OpenSettingsDialog(int page = -1)
         {
+            if (page == -1)
+                page = settingsLastTabPageIndex;
             using (Settings settingsfrm = new Settings(creatureCollection, page))
             {
                 if (settingsfrm.ShowDialog() == DialogResult.OK)
@@ -2048,6 +2054,7 @@ private void OpenSettingsDialog(int page = 0)
 
                     SetCollectionChanged(true);
                 }
+                settingsLastTabPageIndex = settingsfrm.LastTabPageIndex;
             }
         }
 

ARKBreedingStats/settings/Settings.cs

@@ -15,7 +15,7 @@ public partial class Settings : Form
         private readonly CreatureCollection cc;
         private ToolTip tt;
         private Dictionary<string, string> languages;
-
+        public int LastTabPageIndex;
         public bool WildMaxChanged; // is needed for the speech-recognition, if wildMax is changed, the grammar has to be rebuilt
         public bool LanguageChanged;
 
@@ -631,5 +631,10 @@ private void ApplyMultiplierPreset(ServerMultipliers sm, bool onlyStatMultiplier
                 multSetter[s].Multipliers = sm.statMultipliers[s];
             }
         }
+
+        private void Settings_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            LastTabPageIndex = tabControlSettings.SelectedIndex;
+        }
     }
 }