Index: binaries/data/mods/mod/gui/timedconfirmation/timedconfirmation.js
===================================================================
--- binaries/data/mods/mod/gui/timedconfirmation/timedconfirmation.js
+++ binaries/data/mods/mod/gui/timedconfirmation/timedconfirmation.js
@@ -11,7 +11,7 @@
 
 	updateDisplayedTimer(data.timeout);
 
-	Engine.GetGUIObjectByName("tmcTimer").caption = data.timeout;
+	Engine.GetGUIObjectByName("tmcTimer").caption = +data.timeout + Date.now();
 	if (data.font)
 		textObj.font = data.font;
 
@@ -33,16 +33,14 @@
 function onTick()
 {
 	const timerObj = Engine.GetGUIObjectByName("tmcTimer");
-	let time = +timerObj.caption;
-	--time;
-	if (time < 1)
+	const remaining = +timerObj.caption - Date.now();
+	if (remaining < 1)
 		Engine.GetGUIObjectByName("tmcButton1").onPress();
 
-	timerObj.caption = time;
-	updateDisplayedTimer(time);
+	updateDisplayedTimer(remaining);
 }
 
 function updateDisplayedTimer(time)
 {
-	Engine.GetGUIObjectByName("tmcTimerDisplay").caption = Math.ceil(time / 100);
+	Engine.GetGUIObjectByName("tmcTimerDisplay").caption = Math.ceil(time / 1000);
 }
Index: binaries/data/mods/public/gui/options/options.js
===================================================================
--- binaries/data/mods/public/gui/options/options.js
+++ binaries/data/mods/public/gui/options/options.js
@@ -168,7 +168,7 @@
 			timedConfirmation(
 				500, 200,
 				translate("Do you want to keep changes?"),
-				500,
+				option.timeout,
 				translate("Warning"),
 				[translate("No"), translate("Yes")],
 				[() => {this.revertChange(option, +oldValue, hasChanges);}, null]
Index: binaries/data/mods/public/gui/options/options.json
===================================================================
--- binaries/data/mods/public/gui/options/options.json
+++ binaries/data/mods/public/gui/options/options.json
@@ -154,7 +154,7 @@
 			{
 				"type": "dropdownNumber",
 				"label": "GUI scale",
-				"timeout": 500,
+				"timeout": 5000,
 				"tooltip": "GUI scale",
 				"config": "gui.scale",
 				"function": "SetGUIScale",