I and most users don't read what software says and just click where I think I reach my goal fastest. If there are only instructions to do something I am unable to continue.

No I don't think we should support that. I just meant that at first start we have to expect that the user does not have a secret key yet. And offer an easy way out of this by generating one.

If you want to use gpgpass without a secret key, the most I would offer, if at all, is the option to use a symmetric key instead.
Maybe like this:

Yeah this task is a bit bad as it does not really split this up into actionable tasks. But I found it obviously "ugly" (Since QWizards are ugly) and from a user experience standpoint outdated that I thought a general task would be enough to say that this must be changed and improved. The first start is the most important one and to be greeted by a wizard which I still am apparently where I don't really understand what the software wants from me is strange.

Gpgpass already installs a desktop file I just overlooked it.

File dialogs
Code does use the standard Qt File dialog, but I_think I should redo it to use the static methods instead because that let the backend take over.

First start wizard

There is lot of separate things in here. I'll do a couple of different comments per thing