Make Windows installer default for Windows. Fixes #605 - #606

Changed pages include:

• index.html - view
• 2025-fundraising.html - view
• 404.html - view
• backers.html - view
• blog.html - view
• community.html - view
• distributions.html - view
• docs.html - view
• donate.html - view
• download.html - view

There are more changes not included in the list