On 16/08/2021 10:04, Peter wrote:

I'm having two issues which may be related.

Using Dolphin file manager, 'open with' will open the app selected from the dropdown list. Using PCManfm, which I prefer and normally use, clicking on the app has no effect.

Try right clicking on a file (e.g. text file) Either click on Properties, then Change "OpenWith" to whichever app you want, or Open With>  then Open With..., then pick the app. Then see if it works.

It seems that pcmanfm keeps default app names in a couple of places - see: https://lkubaski.wordpress.com/2012/10/29/understanding-file-associations-in...

Any idea how to change that and make it open the selected app?

In Libre Office, it used to be possible to compose a document and then do 'send as', for instance a Word file or a pdf. Libre Office now no longer finds the email application, and I haven't discovered where to set this. Any idea?

This is Debian and Fluxbox, but I don't think it can be a function of Fluxbox since it works fine with Dolphin running in it.

Debian file associations perhaps? https://itectec.com/unixlinux/debian-setting-default-application-for-filetyp...

Oh, actually, LibreOffice (Writer), Tools/Options/Internet/Email Mine is set for "sensible-lomua" - I don't know what that is, but it opens my email client.

Googling "libreoffice email app location" gives several results.

HTH

Steve