XnView Software

Current: Recent search does remember search only when ENTER has been pressed.
Bad: This deafeats the purpose of search as you type
Solution: Implement that search gets saved 1. when a new search gets started (meaning that search field gets cleared and a new search starts) and 2. when search field loses focus after a search has been performed

Also:
Current: Clear recent search clears all recent searches
Bad: Cannot keep specific ones, like very complicated regex searches
Solution: Option to clear specific recent searches one by one

I see that in v91b3 the request has been included. I think it is much better now.
Now only missing is:
1. Selective deletion of recent search items
2. Remember recent search history across sessions