Outrule the possibility that the page might not be fully loaded on older machines will break stuff

downloader.js

@@ -124,14 +124,18 @@ function checkSelection() {
 	}
 }
 
-// This changes the dropdown selection, based on the platform being used.
-ipcRenderer.on("update-value", (e, msg) => {
+
+// main.js sends a ready message if the page is loaded in. This will be received here.
+// process.platform -> 'linux' -> selectedIndex = 2 (Linux)
+// process.platform -> 'win32' -> selectedIndex = 0 (Windows)
+// process.platform -> 'darwin' -> selectedIndex = 1 (macOS)
+ipcRenderer.on("ready", () => {
 	const osdropdown = document.getElementById("osdropdown")
-	if (msg === "linux") {
+	if (process.platform.toString().includes("linux")) {
 		osdropdown.selectedIndex = 2
-	} else if (msg === "win") {
+	} else if (process.platform.toString().includes("win")) {
 		osdropdown.selectedIndex = 0
-	} else if (msg === "darwin") {
+	} else if (process.platform.toString().includes("darwin")) {
 		osdropdown.selectedIndex = 1
 	}
 	checkSelection() // force check the selection so the terminal dropdown can be unhidden.

main.js

@@ -39,11 +39,13 @@ app.whenReady().then(() => {
 		if (BrowserWindow.getAllWindows().length === 0) createWindow()
 	})
 
-	// Waits one second so the DOM is ready, and then sends the process platform to the downloader.
-	// TODO: On slow machine this WILL cause issues. Fix required!
-	setTimeout(() => {
-		BrowserWindow.getFocusedWindow().webContents.postMessage("update-value", (process.platform.toString() || "win"))
-	}, 1000)
+})
+
+// If the page is fully loaded in, send a sign.
+app.on("web-contents-created", (event, contents) => {
+	contents.on("dom-ready", () => {
+		contents.send("ready")
+	})
 })
 
 // Quit when all windows are closed, except on macOS. There, it's common