diff --git a/arm9/src/main.c b/arm9/src/main.c
index 4392a7e..1eade61 100644
--- a/arm9/src/main.c
+++ b/arm9/src/main.c
@@ -2,6 +2,7 @@
 #include "menu.h"
 #include "message.h"
 #include "nand/nandio.h"
+#include "storage.h"
 #include "version.h"
 #include <time.h>
 
@@ -123,6 +124,19 @@ int main(int argc, char **argv)
 		return 0;
 	}
 
+	for (char region = 'A'; region <= 'Z'; region++)
+	{
+		char path[64];
+		sprintf(path, "nand:/title/00030017/484e41%02x/content/title.tmd", region);
+		unsigned long long tmdSize = getFileSizePath(path);
+		if (tmdSize != 0)
+		{
+			if (tmdSize <= 520)
+				messageBox("Unlaunch not found, please\ninstall it.\n\n\x1B[46mhttps://dsi.cfw.guide/\x1B[47m");
+			break;
+		}
+	}
+
 	messageBox("\x1B[41mWARNING:\x1B[47m This tool can write to\nyour internal NAND!\n\nThis always has a risk, albeit\nlow, of \x1B[41mbricking\x1B[47m your system\nand should be done with caution!");
 	messageBox("Do not exit by holding POWER,\ntap it or choose \"Shut Down\".");