[I have not enjoyed my interactions here in the past, but I am going to forget all that for now and try again.]
I NEVER use the complex find files option brought up by CTRL-F. For me it would be best to just leave this in the menus and not have it bound to a hot key. I DO use the find as I type option and CTRL-F all the time. I would like to have Dopus remember what I typed in the last find as I type, even after it times out, and have CTRL-F resume looking as if it hadn't timed out. Would it be possible to have this behaviour? Maybe the option would be something like "never time out 'find-as-you-type' "?
Thanks for those two suggestions, but I don't think this is something you can change after-market without deliberate support from DOpus itself. Find-as-you-type appears to be a self-contained feature-set, not a tool set on which you can build. I will not use "Everything" because it's a security vulnerability. (It runs with permissions to see every file and doesn't restrict which user can see which files.) Unbinding "complex file search" doesn't make any difference to the working of find-as-you-type.
This seems to just be a simplified front end to the more complex search I don't want/use. It's way slower than find-as-you-type, and it also appears to be recursive when find-as-you-type sticks to the folder it's in (which is probably why it's so fast because the file list is presumably entirely in RAM.)
On my end, if I start searching the files currently displayed (current folder + expanded folders) via FAYT, if I stop typing and hit F3 it then selects every file matching one after the other.