So, you are saying that he tried to add the library directly through Peptides Settings - Libraries - Edit List - Add instead of clicking the Build button? Or you mention the Spectral Library Explorer, so maybe by choosing <Add...> from the dropdown list there? And then he clicked the Browse button and found only:
Spectral Libraries (*.blib, *.clib, *.hlf, *.msp, *.sptxt, *.midas, *.elib)
All Files (*.*)
Maybe all we need is to add a message box between clicking the Browse button and showing the OpenFileDialog, like:
Skyline supports the following library formats natively:
BiblioSpec Legacy (*.lib)
X! Hunter (*.hlf)
SCIEX Midas (*.midas)
If the format you have is not in this list you may need to build a BiblioSpec Library.
Consult the page [https://skyline.ms/build-blib.url|How
Skyline Builds Spectral Libraries] for more details.
Post a request to [https://skyline.ms/support|Skyline
Support] if you find the format you have is not covered.
[Add Native] [Build]
I don't really want to pollute the OpenFileDialog with all of the extensions we can build a spectral library from or even just the ones that someone might already consider a "library" rather than search results.