Hi BK,
first of all thanks for sending us a test file - we will fix the issue with loading the file format for the upcoming release.
Generally it has to be noted, that in the current version of OpenChrom MALDI MS data is accessed via a different explorer than GC- or LC-MS data.
Please use the "Mass Spectrum File Explorer (MSD)" and not the "Chromatogram File Explorer (MSD)". There is also a perspective called "Mass Spectrum / Library" which opens the "Mass Spectrum File Explorer (MSD)" amongst other views and is designed for the review of e.g. MALDI MS data or of AMDIS *.msl , NIST *.msp or Shimadzu *.spc libraries.
Andreas