From c0ed056440ef4c1a94bc622a874d40df256b5b75 Mon Sep 17 00:00:00 2001
From: Tixx <83774803+WiserTixx@users.noreply.github.com>
Date: Thu, 17 Jul 2025 14:33:25 +0200
Subject: [PATCH] Fix for backup failing when it's in use

The backup file may still be in use by older launcher versions (v2.0.71) if they update
---
 src/Startup.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Startup.cpp b/src/Startup.cpp
index 9ab0eae..518eee7 100644
--- a/src/Startup.cpp
+++ b/src/Startup.cpp
@@ -185,8 +185,14 @@ void CheckForUpdates(const std::string& CV) {
                 "&pk="
                     + PublicKey + "&branch=" + Branch,
                 beammp_wide("new_") + EP);
+            std::error_code ec;
             fs::remove(Back, ec);
+            if (ec == std::errc::permission_denied) {
+                error("Failed to remove old backup file: " + ec.message() + ". Using alternative name.");
+                fs::rename(EP, Back + beammp_wide(".") + Utils::ToWString(FileHash.substr(0, 8)));
+            } else {
                 fs::rename(EP, Back);
+            }
             fs::rename(beammp_wide("new_") + EP, EP);
             URelaunch();
 #endif