Warn 32-bit app users on 64-bit Windows - #21435

Just passing by to say using the 32-bit version helped me develop some game cheats with Cheat Engine (for easier memory address reading and Cheat Engine sometimes refusing to work with the 64-bit version).

While I think it could be helpful for the general public it also seems annoying to have a popup warn you EVERY time u boot up a game (especially for developers). I mean, I don't think you need to be constantly reminded that you're running the 32-bit app.

But that's just my opinion.

PS: Are there actually any significant differences between the 32-bit and 64-bit versions? (Talking about that "optimal performance")

The 64-bit version probably runs about 10% faster and is more resilient to memory corruption due to games doing bad things, due to the complete separation of the PSP's memory space, which we can't achieve in 32-bit.

But in practical terms you won't notice much difference, no. So I'm not really sure it's worth it to annoy the user...

32-bit support on Windows is not going away any time soon.

This is invasive, popup nag notification upon every game boot ain't a good idea at all imo, people might use the emulator in this setup for a reason, let's not disturb and annoy them.

This is invasive, popup nag notification upon every game boot ain't a good idea at all imo

Note that the popup happens upon the launch of the emulator, not the launch of a game. In the screenshot I've just showcased the scenario of launching the emulator through desktop shortcuts for specific games.

Thinking about it more, if we do this I think the way to go would be a single time popup that does not return and nag, and/or maybe a subtle message somewhere in settings.

One issue with only showing the popup once, is that it won't encourage users to recreate/edit all of their desktop shortcuts (or paths in a launcher, if somebody uses one).

Perhaps a setting hidden under Development tools to disable it? Just thinking out loud...

The 64-bit version probably runs about 10% faster and is more resilient to memory corruption due to games doing bad things, due to the complete separation of the PSP's memory space, which we can't achieve in 32-bit.

Is there a way to actually measure this? Because I think 5-10% is a lot.

To summarize: (not AI generated I swear)

• This PR adds a warning message on startup, when the 32-bit PPSSPP executable is being launched on 64-bit Windows PCs.

Running 32-bit PPSSPP on a 64-bit system.
For the optimal experience, use 'PPSSPPWindows64.exe'.

• The motivation is that many people don't know that they should be using the 64-bit executable.

How it works:

• The logic is processed on starting of the emulator, not on starting of individual games.
• This means the warning is only shown once per PPSSPP session.

Why it works this way:

• So that the warning message shows up both when launching PPSSPP normally (into the main menu) and when launching straight into a game (eg via a desktop shortcut).
• So that people don't forget to update their desktop shortcuts and game launcher setups to use the 64-bit executable. (This is why the so called "nagging" is necessary.)

A configuration option (enabled by default) has been added, so that the warning can be disabled for people who explicitly want to use the 32-bit executable on 64-bit PCs for game research purposes or other technical use cases.

Please squash if you decide to merge this.