SUMMARY

Running version 20.04.1 from a downloaded appimage on Ubuntu 18.04. Been editing a video for a few days, saving periodically. It crashes ocassionally, mostly when trying to enable a track that was previously disabled. Then, on deleting a cut out bit of a track, it crashed. I restarted, selected the recover files, and it crashed anyway. So I restarted and selected not to load the recover files. It still crashed. So I dead in the water. Here's the final few lines from the console:
CLIPS COUNT:  81
REGISTRATION  91 ptr count 3
XML parsing of  "gain" . found :  1
END parsing of  "gain" . Number of found parameters 1
XML parsing of  "avfilter.lowpass" . found :  8
WARNING: Unknown type : "fixed"
 = = SET EFFECT PARAM:  "position"  =  "frame"
END parsing of  "avfilter.lowpass" . Number of found parameters 7
/tmp/.mount_kdenli29HDvp/AppRun: line 26: 32151 Segmentation fault      (core dumped) kdenlive --config kdenlive-appimagerc $@
ddixon@Nash:~/kdenlive$ 

STEPS TO REPRODUCE
1. Try to load the file.
2. 
3. 

OBSERVED RESULT

Crashes.

EXPECTED RESULT

Not crash.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

Linux Gnome

ADDITIONAL INFORMATION