I have been trying to download the desktop app for an hour now. Seems pretty simple but your links are all broken, all 4 of them: 32 and 64 bit , both standard and beta versions.
I just tested it but couldn't replicate the issue you're experiencing. Are you trying to download it on this page? What OS are you using? I tested with 32-bit Standard for Windows and the download was initiated as usual. Could you please make sure nothing in your browser or antivirus is blocking downloads?
I'm having similar issue. The tracker was working fine until today. Uninstalled and re-installed. turned off protection software. But the download window closes at 80%. Only the messages open but the time tracker window is not opening/appearing.