fixed windows bugs

installer.go

@@ -67,8 +67,7 @@ func (inst *Installer) StartDownloadDecompress() {
 
 		// 3) Decompress
 		spm.UpdateProgress(0, "Decompressing...")
-		packagePath := filepath.Join(inst.DownloadDir, "browser-amd64-nightly-linux.tar.gz")
-		tempDir, err := spm.DecompressToTemp(packagePath)
+		tempDir, err := spm.DecompressPackage(inst.DownloadDir)
 		if err != nil {
 			inst.LastError = err
 			return

main.go

@@ -30,6 +30,9 @@ const finalStep = 3
 
 func main() {
 	monitor := rl.GetCurrentMonitor()
+	if monitor < 0 {
+		monitor = 0 // Fallback to the primary monitor
+	}
 	screenW := rl.GetMonitorWidth(monitor)
 	screenH := rl.GetMonitorHeight(monitor)
 

spm/utils.go

@@ -62,3 +62,10 @@ func GetDefaultInstallDir() (string, error) {
 
 	return installDir, nil
 }
+
+// DecompressPackage determines the appropriate package format and decompresses it.
+func DecompressPackage(downloadDir string) (string, error) {
+	osName := runtime.GOOS
+	packagePath := filepath.Join(downloadDir, fmt.Sprintf("browser-amd64-nightly-%s.tar.gz", osName)) // If file naming changes this will break!!
+	return DecompressToTemp(packagePath)
+}