Here's one free solution...
Download and install
Freemake Video Converter. It is free and unrestricted. Note that this will require the .NET Framework 4 and the installer will handle this if required.
Freemake incorporates a - rather rudimentary - editor a bit like VideoReDo but with fewer bells and whistles. The converter program will open Hummy .ts files, both SD and HD, but (on my non-accelerated system, at least) the editor can't handle the HD files. However, this is not the end of the world: the key is to convert first, then edit.
Open a decrypted Hummy HD .ts file in Freemake and convert it to .avi or .mkv. I downsize it at this stage to 720HD as 1080 is of no benefit on my system and just takes up more room. The converted file (at 720p) will be little more than 25% the size of the original and IMHO the quality is indistinguishable. Of course, either file type will run on a PC, but if you want to transfer the file back to the Hummy or use it via DNLA, pick the .avi option. The time taken for the conversion will depend on your system: with a modern accelerated graphics card it will be much quicker than my creaky PC!
When the conversion is finished, open the new file in Freemake and enter the editor, where you can remove the leader, trailer and adverts. Then convert the file again, using the 'same as original' setting which quickly resaves the edited file without re-encoding it.
Job done. Together with all the business of getting the file off the Hummy in the first place, it's not exactly quick. Nevertheless, Freemake is an impressively simple converter that will handle all sorts of formats with no need to understand the abstruse details of file formats and it's the only free one I've found with a simple editing option.