An update for the ProtonMail Bridge app offers to encrypt and decrypt emails that are stored locally for much quicker access. There's a new Status View and stability improvements as well.
Windows 11 in Release Preview adds urgent notifications bypass and more
windows 11 insider preview
Windows 11 released to Dev Channel and ISO comes with File Explorer tabs
windows 11 promo
Protonmail bridge RSS
Proton Technologies has released the ProtonMail Bridge app for Linux. Bridge allows you to use a desktop e-mail client to access your ProtonMail account. It's already available on macOS and Windows.
The team behind ProtonMail has released ProtonMail Bridge for Windows and macOS with plans for a Linux release in spring 2018. It allows you to access ProtonMail through a desktop mail client.