SamyGO

You should use older version of PVRdecoder (v1.5.3.4, attached to 1st post), that doesn't have Tools menu greyed out in case of no TV connection, and therefore offline decryption reachable. Of course, if useful to remind, there is absolutely NO way to decrypt recordings if keys weren't previously ex...

It's just under my name

Nope. Also I've checked, it's not available here.

Model/hardware variants obviously. Yours takes *only* T-MSV and some others will take only T-MST.
You can never install a fw with a different name.

Should work, we just tried with an app not available in store of another region/series (from K/fr to M/pl) and it installed

Not sure it would be more detailed if you found exact model. 3rd digit of a model number usually doesn't change a TV (regional variant, different design, color, etc, but same crap).

That one there should be similar enough.

Nah tmg. It's a squashfs img but has extension .tmg

I don't know what you're looking for but widgets are basically nothing more than html+js. Often they're even just a frame where some webpage is opened (and that's why widget, website, apk, etc, are all looking same), hence nothing to see.