diff --git a/src/net/torvald/terrarum/IngameInstance.kt b/src/net/torvald/terrarum/IngameInstance.kt
index 82a069309..69bb4a403 100644
--- a/src/net/torvald/terrarum/IngameInstance.kt
+++ b/src/net/torvald/terrarum/IngameInstance.kt
@@ -410,14 +410,14 @@ open class IngameInstance(val batch: FlippingSpriteBatch, val isMultiplayer: Boo
     /**
      * Copies most recent `save` to `save.1`, leaving `save` for overwriting, previous `save.1` will be copied to `save.2`
      */
-    fun makeSavegameBackupCopy(file: File) {
+    fun makeSavegameBackupCopy(file: File, isAuto: Boolean) {
         if (!file.exists()) {
             return
         }
 
-        val file1 = File("${file.absolutePath}.1")
-        val file2 = File("${file.absolutePath}.2")
-        val file3 = File("${file.absolutePath}.3")
+        val file1 = File("${file.absolutePath}.${if (isAuto) "a" else "1"}")
+        val file2 = File("${file.absolutePath}.${if (isAuto) "b" else "1"}")
+        val file3 = File("${file.absolutePath}.${if (isAuto) "c" else "1"}")
 
         try {
             // do not overwrite clean .2 with dirty .1
diff --git a/src/net/torvald/terrarum/Principii.java b/src/net/torvald/terrarum/Principii.java
index 038560c5b..b7c4c6a7b 100644
--- a/src/net/torvald/terrarum/Principii.java
+++ b/src/net/torvald/terrarum/Principii.java
@@ -3,6 +3,7 @@ package net.torvald.terrarum;
 import com.badlogic.gdx.utils.JsonValue;
 import net.torvald.terrarum.utils.JsonFetcher;
 
+import java.io.File;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
@@ -83,8 +84,12 @@ public class Principii {
 
         int xmx = getConfigInt("jvm_xmx");
 
+        String runtime = new File("./out/runtime-osx-x86/bin/java").getAbsolutePath();
+
+        System.out.println("Runtime path: "+runtime);
+
         try {
-            Process proc = Runtime.getRuntime().exec("java"+extracmd+" -Xms1G -Xmx"+xmx+"G -cp ./out/TerrarumBuild.jar net.torvald.terrarum.App");
+            Process proc = Runtime.getRuntime().exec(runtime+extracmd+" -Xms1G -Xmx"+xmx+"G -cp ./out/TerrarumBuild.jar net.torvald.terrarum.App");
 
             Thread tp = new Thread(() -> {
                 String p = null;
diff --git a/src/net/torvald/terrarum/modulebasegame/TerrarumIngame.kt b/src/net/torvald/terrarum/modulebasegame/TerrarumIngame.kt
index df63aacf0..57a63b99a 100644
--- a/src/net/torvald/terrarum/modulebasegame/TerrarumIngame.kt
+++ b/src/net/torvald/terrarum/modulebasegame/TerrarumIngame.kt
@@ -420,10 +420,10 @@ open class TerrarumIngame(batch: FlippingSpriteBatch) : IngameInstance(batch) {
         uiAutosaveNotifier.setAsOpen()
         val saveTime_t = App.getTIME_T()
         WriteSavegame.immediate(saveTime_t, WriteSavegame.SaveMode.PLAYER, playerDisk, getPlayerSaveFiledesc(playerSavefileName), this, true, autosaveOnErrorAction) {
-            makeSavegameBackupCopy(getPlayerSaveFiledesc(playerSavefileName))
+            makeSavegameBackupCopy(getPlayerSaveFiledesc(playerSavefileName), true)
 
             WriteSavegame.immediate(saveTime_t, WriteSavegame.SaveMode.WORLD, worldDisk, getWorldSaveFiledesc(worldSavefileName), this, true, autosaveOnErrorAction) {
-                makeSavegameBackupCopy(getWorldSaveFiledesc(worldSavefileName)) // don't put it on the postInit() or render(); must be called using callback
+                makeSavegameBackupCopy(getWorldSaveFiledesc(worldSavefileName), true) // don't put it on the postInit() or render(); must be called using callback
                 uiAutosaveNotifier.setAsClose()
             }
         }
@@ -1111,10 +1111,10 @@ open class TerrarumIngame(batch: FlippingSpriteBatch) : IngameInstance(batch) {
         val playerSavefile = getPlayerSaveFiledesc(INGAME.playerSavefileName)
         val worldSavefile = getWorldSaveFiledesc(INGAME.worldSavefileName)
 
-        INGAME.makeSavegameBackupCopy(playerSavefile)
+        INGAME.makeSavegameBackupCopy(playerSavefile, true)
         WriteSavegame(saveTime_t, WriteSavegame.SaveMode.PLAYER, INGAME.playerDisk, playerSavefile, INGAME as TerrarumIngame, true, autosaveOnErrorAction) {
 
-            INGAME.makeSavegameBackupCopy(worldSavefile)
+            INGAME.makeSavegameBackupCopy(worldSavefile, true)
             WriteSavegame(saveTime_t, WriteSavegame.SaveMode.QUICK_WORLD, INGAME.worldDisk, worldSavefile, INGAME as TerrarumIngame, true, autosaveOnErrorAction) {
                 // callback:
                 // rebuild the disk skimmers
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryEscMenu.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryEscMenu.kt
index af3626f68..f73aef983 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryEscMenu.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryEscMenu.kt
@@ -110,10 +110,10 @@ class UIInventoryEscMenu(val full: UIInventoryFull) : UICanvas() {
                     val worldSavefile = getWorldSaveFiledesc(INGAME.worldSavefileName)
 
 
-                    INGAME.makeSavegameBackupCopy(playerSavefile)
+                    INGAME.makeSavegameBackupCopy(playerSavefile, false)
                     WriteSavegame(saveTime_t, WriteSavegame.SaveMode.PLAYER, INGAME.playerDisk, playerSavefile, INGAME as TerrarumIngame, false, onError) {
 
-                        INGAME.makeSavegameBackupCopy(worldSavefile)
+                        INGAME.makeSavegameBackupCopy(worldSavefile, false)
                         WriteSavegame(saveTime_t, WriteSavegame.SaveMode.WORLD, INGAME.worldDisk, worldSavefile, INGAME as TerrarumIngame, false, onError) {
                             // callback:
                             // rebuild the disk skimmers