After some more research about the 1.5alpha API issue.
It seems you can set a property in Everything (advanced settings section), which seems to make it 1.4 compatible somehow. I tried and it seems to work.
alpha_instance=0
There are several references about this setting in the Everything forum and even here:
https://www.voidtools.com/forum/viewtopic.php?p=36726#p36726