Windows version

[lafrech]

Since it relies on Qt, QBirthday should work on Windows.

From a quick check using Anaconda, it seemed to work but the theme icons were missing.

I had issues at the installation. That could be because I'm not used to Python on Windows.

For now, I try to keep it as platform-agnostic as possible, but there are issues.

For instance, the path to the Lightning profile is Linux only. This would be easy to hack but I'd be happy to find a way to do that with Qt if it is possible rather than introduce conditional code.