Your StreamFab.log appears to show that you shut down StreamFab before it even started to do a download and any indication as to whether that download would be at 1080p or 480p.
2023:12:16-16:14:06 0x00006104 [Info]: [closeEvent]: enter
2023:12:16-16:14:07 0x00006104 [Info]: [CloseApp]: enter
2023:12:16-16:14:07 0x00006104 [Info]: [BrowerWnd]: close tab
2023:12:16-16:14:10 0x00006104 [Info]: [QCefWebView]: delete cef view instance, begin
2023:12:16-16:14:10 0x00006104 [Info]: [QCefWebView]: delete cef view instance, stop timer
2023:12:16-16:14:10 0x00006104 [Info]: [QCefWebView]: delete cef view instance, done
2023:12:16-16:14:13 0x00006104 [Info]: global: app Exit begin
2023:12:16-16:14:13 0x00006104 [Info]: global: save Statistics Data
2023:12:16-16:14:13 0x00006104 [Info]: global: app Exit endâ
Please delete your logs and try again.