As for C++ packages (not the WAs, the final installed packages), you need both x86 and x64 C++ on 64bit systems. The reason is simple: Only true 64bit programs can use the 64bit DLLs, 32bit programs running on the SysWOW3264 emulation layer require the x86 ones. IOW, a 32bit program running on 64bit Windows needs the 32bit runtimes.
What Carlos said applies to runtime installers(or even addons for integration) in general: For a 64-bit system you need to confirm that the "x64" package(installer or addon) includes both 64-bit and 32-bit runtimes. If it doesn't, you will indeed have to use both the x86 and x64 packages. Usually, this is stated in the description of whatever runtime you're looking into.
Could someone please clarify me something? The pack now comes with USB3 drivers integrated? Because i used to integrate them by my own. Thank you.
You can set it to integrate an USB3.x driver installer, check the info at the OP (first post of this thread).
That's the part that confused me. Before, i was using the "Integrator" program, where there was a folder for drivers and i was putting the drivers in the folder myself and it was integrating them without using any particular switch. This is what confused me.
Thank you, now i understand. I used the "Boss integrator" before, because it seemed to me to be easier to make a new ISO with the Simplix pack integrated. But, i understand the difference now. Thank you very much.
June 2019 update? Don't know about such thing. Assuming you're referring to May 2019 update(19.5.15), how are you running the updatepack? Is there anything specific to your system that we should know about?