I have tested on a virtual machine with 4GB RAM and I have experienced several crashes that were logged as "OUT OF MEMORY" problems. Otherwise, the functionality of the application was quite good, although I did not have some of the dependencies installed (hugin, etc.). Does it really depend that much on the memory, or is there another problem?

The log file shows this:

start fotoxx Thu Jan 4 11:05:51 fotoxx home directory: /home/ftester/.fotoxx language: cs_CZ .po file has 1406 entries fotoxx-18.01 GTK version: 3.22.26 exiftool version: 10.55 Raw Therapee not installed growisofs not installed ffmpeg and Totem not installed Panorama Tools (Hugin) not installed smazáno '/tmp/fotoxx-015877-ZDckSp/undo_00' smazáno '/tmp/fotoxx-015877-ZDckSp/exiftool_input1' adresář '/tmp/fotoxx-015877-ZDckSp' smazán tempdir: /tmp/fotoxx-016132-Impaxa free memory: 1391 MB image size limits for good performance: view: 215 megapixels edit: 24 megapixels screen width: 1024 height: 768 using 1 threads full image index: reports will be complete top image directories: /home/ftester/Pictures thumbnails directory: /home/ftester/.fotoxx/thumbnails image files found: 2 index updates needed: 0 index updates: 0 thumbnail updates: 0, deletes: 0 writing updated image index file index time: 0.1 seconds startup time: 2.1 secs. LOW MEMORY - performance may be poor OUT OF MEMORY ====

High memory use doesn't surprise me, but that might be a bit much. There's 18.01.1 release on it's way, see if that's better.