So I was trying to beat the initial scan, which has already loaded the exclusions while the first update is happening. If I cancel the scan I have time to enter the whole file path before the scan starts. I did notice this as well, I cannot uninstall the HEIF Extension app anymore. That was my next course of action. I will see what the case is, as it is strange. So I cancelled the initial scan, added the path by hand, and then started a new scan. It seems to take the exclusion and is running fine. I had added the HEIF Image Extension app a long time ago in 1909, but I don't think I had ESET installed at the time. That app data folder in 2004 is mostly empty now.