Machine-Readable
Papa’s Best STL Thumbnails icon

Desktop App Updated | Proton Mail

A shell extension that adds preview thumbnails for STL files to Windows Explorer. Runs on Windows 7 or later.

Can also be used with Total Commander and FreeCommander.

Papa’s Best STL Thumbnails displaying a folder with random STLs from thingiverse

Download

Updated (changes, license).

Feel free to donate if you like my program!

64-bit Setup

recommended

32-bit Setup

for old systems

Video Guide

Michael from Teaching Tech made a video guide about the installation. He was so kind to allow me to embed it here! Thumbnail installation starts at 1:49.

Fast

Thumbnail generation is based on the fastest STL viewer available. Folders full of STL files are no problem, and most STL thumbnails are generated as fast as those of JPG photos.

Free

Compatible

Papa’s Best STL thumbnail viewer displays countless STL variations, even where other programs fail:

Desktop App Updated | Proton Mail

Unlike Apple Mail or Outlook connecting to Proton Bridge, the desktop app maintains E2EE by default. Emails between Proton users are fully encrypted; PGP-signed emails to external users work as expected.

: The app is available to all users with a paid Proton Mail plan .

: Allows you to read, organize, and draft emails without an internet connection; changes sync automatically once you are back online. proton mail desktop app

: Integrates both Proton Mail and Proton Calendar into one interface.

This style focuses on productivity, security infrastructure, and the "why" behind the update. Unlike Apple Mail or Outlook connecting to Proton

[Link to download page]

New users can easily migrate messages, contacts, and calendars from non-Proton accounts like Gmail or Outlook directly within the app. Security Architecture : Allows you to read, organize, and draft

The official for Windows, macOS, and Linux provides a dedicated, security-hardened environment for managing encrypted email and calendars without a web browser. Key Features & Capabilities

The desktop application is designed to be fast and responsive, frequently outperforming the web version in scrolling and message-handling speeds.


Installation for all users

Papa’s Best STL Thumbnails installs for the current user by default. To install for all users on a system, open a command prompt or a PowerShell and run msiexec /i "Papas Best STL Thumbnails.msi" MSIINSTALLPERUSER="".

Repeat with every update!

Unlike Apple Mail or Outlook connecting to Proton Bridge, the desktop app maintains E2EE by default. Emails between Proton users are fully encrypted; PGP-signed emails to external users work as expected.

: The app is available to all users with a paid Proton Mail plan .

: Allows you to read, organize, and draft emails without an internet connection; changes sync automatically once you are back online.

: Integrates both Proton Mail and Proton Calendar into one interface.

This style focuses on productivity, security infrastructure, and the "why" behind the update.

[Link to download page]

New users can easily migrate messages, contacts, and calendars from non-Proton accounts like Gmail or Outlook directly within the app. Security Architecture

The official for Windows, macOS, and Linux provides a dedicated, security-hardened environment for managing encrypted email and calendars without a web browser. Key Features & Capabilities

The desktop application is designed to be fast and responsive, frequently outperforming the web version in scrolling and message-handling speeds.


Dark background on some thumbnails

a folder with two thumbnails whose background is entirely black

Clear your Explorer thumbnail cache (see above) or copy the file to a different location.

This is a bug in Windows 10 that also affects other thumbnails – for example transparent PNG images here and here.

I can’t do anything in my program to work around it, I’m afraid. Please use the Windows 10 feedback function to report this to Microsoft. If enough users do it, they may eventually fix it. Windows 7 does not have this bug.


Something Missing?

Encountered a problem? Have a suggestion? Let me know: