diff --git a/testing/install_script.sh b/testing/install_script.sh
index 0b74a93..f590768 100644
--- a/testing/install_script.sh
+++ b/testing/install_script.sh
@@ -58,8 +58,10 @@ if [ $MC_TYPE = "vanilla" ]; then
 			echo " "
 			echo "INFO ! Cleaning old files."
 			mkdir -pv $MC_DIR/old-server-versions
-			mv -v $MC_DIR/*.jar $MC_DIR/old-server-versions
+			rm -fr $MC_DIR/*.jar $MC_DIR/old-server-versions
 			mv -v $MC_DIR/*.log $MC_DIR/old-server-versions
+			mv -v $MC_DIR/run-*.sh /old-server-versions
+			rm -fr $MC_DIR/libraries
 			wget --no-cache --show-progress --progress=bar:force:noscroll $MC_SERVER_FILE -O $MC_DIR/MCserver-$MC_VERSION.jar
 			chmod +x $MC_DIR/MCserver-$MC_VERSION.jar
 	fi
@@ -88,8 +90,10 @@ elif [ $MC_TYPE = "bukkit" ]; then
 			echo " "
 			echo "INFO ! Cleaning old files."
 			mkdir -pv $MC_DIR/old-server-versions
-			mv -v $MC_DIR/*.jar $MC_DIR/old-server-versions
+			rm -fr $MC_DIR/*.jar $MC_DIR/old-server-versions
 			mv -v $MC_DIR/*.log $MC_DIR/old-server-versions
+			mv -v $MC_DIR/run-*.sh /old-server-versions
+			rm -fr $MC_DIR/libraries
 			wget --no-cache --show-progress --progress=bar:force:noscroll $BUKKIT_INSTALLER_FILE -O $MC_DIR/craftbukkit-$MC_VERSION.jar
 			chmod +x $MC_DIR/craftbukkit-$MC_VERSION.jar
 	fi
@@ -118,8 +122,10 @@ elif [ $MC_TYPE = "fabric" ]; then
 			echo " "
 			echo "INFO ! Cleaning old files."
 			mkdir -pv $MC_DIR/old-server-versions
-			mv -v $MC_DIR/*.jar $MC_DIR/old-server-versions
+			rm -fr $MC_DIR/*.jar $MC_DIR/old-server-versions
 			mv -v $MC_DIR/*.log $MC_DIR/old-server-versions
+			mv -v $MC_DIR/run-*.sh /old-server-versions
+			rm -fr $MC_DIR/libraries
 			wget --no-cache --show-progress --progress=bar:force:noscroll $FABRIC_SERVER_FILE -O $MC_DIR/fabric-$MC_VERSION-$FABRIC_VERSION.jar
 			chmod +x $MC_DIR/fabric-$MC_VERSION-$FABRIC_VERSION.jar
 	fi
@@ -150,7 +156,7 @@ elif [ $MC_TYPE = "forge" ]; then
 			echo "INFO ! Cleaning old files."
 			cd $MC_DIR
 			mkdir -pv old-server-versions
-			mv -v *.jar /old-server-versions
+			rm -fr *.jar /old-server-versions
 			mv -v run-*.sh /old-server-versions
 			mv -v *.log /old-server-versions
 			rm -fr libraries
@@ -159,6 +165,9 @@ elif [ $MC_TYPE = "forge" ]; then
 			java -jar forge-$MC_VERSION-$FORGE_VERSION-installer.jar --installServer
 			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
 			chmod +x run-$MC_TYPE-$MC_VERSION.sh
+			echo '-Xmx$XMX_SIZE' > user_jvm_args.txt
+			echo '-Xms$XMS_SIZE' > user_jvm_args.txt
+			echo '-Xmn$XMN_SIZE' > user_jvm_args.txt
 			cd ..
 	fi
 
@@ -175,7 +184,7 @@ elif [ $MC_TYPE = "neoforged" ]; then
 			echo "INFO ! Cleaning old files."
 			cd $MC_DIR
 			mkdir -pv old-server-versions
-			mv -v *.jar /old-server-versions
+			rm -fr *.jar /old-server-versions
 			mv -v run-*.sh /old-server-versions
 			mv -v *.log /old-server-versions
 			rm -fr libraries
@@ -184,6 +193,9 @@ elif [ $MC_TYPE = "neoforged" ]; then
 			java -jar neoforge-$NEOFORGED_VERSION-installer.jar --installServer
 			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
 			chmod +x run-$MC_TYPE-$MC_VERSION.sh
+			echo '-Xmx$XMX_SIZE' > user_jvm_args.txt
+			echo '-Xms$XMS_SIZE' > user_jvm_args.txt
+			echo '-Xmn$XMN_SIZE' > user_jvm_args.txt
 			cd ..
 	fi