Use backslashes in file paths for windows

[Dinika]

The download should keep working on mac and linux. I want to deploy (to dev at least) this PR to check if it will also work on windows. I am having some issues setting up a windows VM.

How has this been tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added necessary unit and integration tests.
• I have added screenshots (if applicable), in the comment section.

[bilalesi]

nice one @Dinika 👍 , let's give it a try on dev