Just do yourself a favor and uninstall BitDefender. All anti-viruses from thirdparties are causing more problems than they solve nowadays. Since you're competent enough to use itch.io, you definitely don't need an anti-virus that just preemptively blocks harmless programs to make you think it's being useful and protecting you.
Edit: To make this more clear as mentioned bladededge below, Windows Defender (by Microsoft) is fine and you should definitely keep it on. I am only talking about *thirdparty* anti-virus products.