Continual Windows fixes

What's Changed

• Update upgrade.go by @tristan-nsg in #73
• FIX #71: old symlink should be removed on Windows by @guidoschmidt in #72

New Contributors

• @tristan-nsg made their first contribution in #73

Full Changelog: v0.6.2...v0.6.3

Supporters

Thank you Birk and Emil for financially supporting ZVM. If you would like to have your name featured in release notes with a link to your site go on over to my Polar and choose to support Open Source Software for less than a coffee a month.