Downgrade macOS without losing stuff?

Hey! I have a successfully running hackintosh with macOS mojave which I have been using for a couple weeks. I am using my integrated graphics (HD 530) without any issues. But I also have my GTX 1050ti which is sitting in a drawer for that time. So I wanted to ask can I downgrade my macOS mojave to high sierra without formatting or losing my softwares maybe through app store?

PC Specs:

Gigabyte H110m-2

i7 6700

HD 530 (integrated)

8GB ddr4 kingston value ram

submitted by /u/Mystic_Gohan780
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