DeconMSn 2.2 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among DeconMSn users are 2.3 and 2.2. This free software was originally produced by Battelle PNNL. The program relates to Education Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
DeconMSn creates spectrum files for tandem mass spectrometry data. It can read Thermo Finnigan .Raw files (though you must separately install Xcalibur to obtain the required DLLS). Alternatively, the input data can be in the mzXML format. The program can process data from low resolution instruments (e.g. LCQ or LTQ) and from high resolution instruments (e.g. LTQ-FT or LTQ-Orbitrap).
You may want to check out more software, such as StatPlus 2007, Adding Machine or GenScn, which might be similar to DeconMSn.