Convert a .sis.dm/.sisx.dm files to a .sis/.sisx file. Some times you’ll get a .dm file while downloading apps from Nokia Store using your PC or 3rd party browsers like UC Browser. Don’t worry, it can be easily converted into SISx / SIS file using either OVI DM Splitter or by following the simple video tutorial in over here with Notepad++ Windows PC Application.
Method 1: Using Ovi DM Splitter Application on Windows Based PC
Download: N8FanClub.com_Ovi DM Splitter v0.2 and dm to sis converter.zip – Mirrors: 1, 2, 3
Just Drag and drop the .DM file on the application and it will convert .DM file to .SIS file.