I have asked the devs on Slack, let's wait for their answer...
Can't you just copy the filename from the file-list and insert it into the command?
I tried it (and a lot of other work arounds) and was not successful
An answer from the devs: It is not (yet) possible to use wildcards in the CLI but it should be possible to select and delete the files in the UI. In the UI it is also possible to select a range of files with Shift+Click.
if I try it I get a "Sia-UI Files Error - no file known with that path"
maybe I just let the files where they are and ignore them (in hope that * and ? wildcards will be available sometime)
@betaboot thank you for the effort
For future reference, what foreign characters are a problem? Can they be reproduced here?
yes sure - the charcter are these: ä ü ö
you may find them here: https://www.lsa.umich.edu/german/hmr/schreiben/umlaute/umlaute_ASCII_html.html