Attention everyone!
It has come to my attention that McAfee's antivirus software will automatically delete skyscrapersim downloads after a few seconds for no apparent reason. This has left me and potentially other skyscrapersim users from being able to update the software to the latest version, or even worse, not being able to use the software at all.
Solution that has worked for me right now:
1. Go to the McAfee Total Protection (or whatever program you are using)
2. Look for "My protection" on the left hand side
3. Under "Protect your PC", look for "Quarantined Items"
4. Restore the skyscrapersim download that was mistakenly deleted.
5. Enjoy Skyscrapersim
If you find an even better solution, please let me know.