How to run FL Studio 11.1.1 and 12.0.2 64bit on Windows XP 64bit

[Michael_]

So i'm currently building a retro XP 64bit system in virtualbox (and eventually on real hardware).
Pretty much all the desired Software runs without an issue, only FL 11 64bit gave me some issues:
- 32bit Plugin Bridge Crashes with Error
- OGG Vorbis encoded wav files from the demo project would not load
- When trying to save the project as a .zip file it would complain that DelZip64.dll does not exist despite it does exist.

Those errors are exclusive to the 64bit version and the Bridge Error is exclusive to Version 11 as Version 12 does not have it.
Also on Windows 7 those errors do NOT exist.

I spent about 2 days debugging this and with the help of ChatGPT and Claude i managed to fix those.
I attached the necessary patches below.

So if anyone ever wants to run FL Studio 11.1.1 64bit (or 12.0.2) on Windows XP 64bit SP2, you now can.
Please note that if you are using Windows XP 32bit or Windows 7 you do NOT need those patches!