Dear CrystFEL users and interested crystallographers, CrystFEL version 0.10.0 has been released! This is a huge update to CrystFEL, adding a completely new graphical user interface (GUI) which makes it much easier to interact with your data, guiding you through the processing steps. To give a preview of the GUI and help you get started, I've made a video tutorial to accompany this release: https://www.desy.de/~twhite/crystfel/presentations.html Electron diffraction is fully supported in this version of CrystFEL. Amongst other things, you can now specify an electron accelerating voltage (instead of an X-ray photon energy) in the geometry file. Combined with the 'diffractem' pre-processing software developed by the Max Planck Institute for the Structure and Dynamics of Matter, you have a complete solution for processing data from serial electron diffraction crystallography. For more details, see: https://gitlab.desy.de/thomas.white/crystfel/-/blob/master/doc/articles/electrons.rst In addition, I've taken advantage of the extended quiet time to work on many internal parts of CrystFEL. The most noticable benefit of this is that several parts of CrystFEL are now much faster. Some command-line parameters and geometry file directives have changed, but you should find that the error messages will direct you towards what needs to be updated. See the release notes and the ChangeLog for full details of the other improvements. Release notes for version 0.10.0: https://www.desy.de/~twhite/crystfel/relnotes-0.10.0 Change log: https://www.desy.de/~twhite/crystfel/changes.html CrystFEL website: https://www.desy.de/~twhite/crystfel Thanks for all of your past and future feedback and contributions, and your continued use of CrystFEL. As ever, please contact me directly if you would prefer to be unsubscribed from this mailing list. Tom