Install ATEM software on a 64bit Windows computer.Do not run the ATM configuration utility from a 32 bit machine. You should ensure that your switcher is running the same firmware as the copy of the software panel you copied from the 64Bit machine. Note: this is not suitable for managing updates to your switcher firmware. 7.5.2 and 8+ do not work even thoug the API and all of my PowerShell solutions work fine with 7.5.2 and 8+ on 32bit Windows 10.
He is a simple trick if you just want to get the software panel to work on 32 bit Windows or use 3rd party software such as JustMacros or my PowerShell/Xkeys/Arduino solutions.
It is just the installer that insists on 64 bit Windows. The SDK and API still support 32 bit and the software panel software itself is still 32 bit. Since version 6.4 of the ATEM software, Blackmagic has required 64 bit widows for the installer.