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'Configure Viewer' changes are saved but not used until dialog is reopened.

Posted: 02.01.2026, 01:57
by Dr_Eyeball
Severity: minor
Build: 939 64-bit donor

Also note that the help page is out of date. This bug report relates to this screen: https://freecommander.com/fchelpxe/en/General5.html
Image

Steps to Reproduce:
  1. Go to:
    Tools (menu) → Settings (menu) → View (tree) → Viewer (tree) → General (tab) → Viewer (button)
  2. Go to:
    General (tab) → 'as Windows preview:' (field)
    But all extension fields are probably affected by this, too.
  3. Add an extension (eg: '.json') to the start of the line.
    .json
  4. Click 'Ok' button
  5. Click 'Apply' button
Problem:
You will find that the change is saved but not recognised.

Work around:
So you need to revisit the 'Configure Viewer' dialogue screen, where you will see the item list is now sorted.
Then click 'Ok' again, and only now will it work and be recognised.

Thanks.