Hey Andy,
First of all: Congratulation, super work!!!
Thanks a lot!I tried just now you new App, here are my remarks:
1) This first question is hmmm, maybe a curious thing, but does not really matter.
I tried two different times, each time only one search-word (Käse and in the second run hinwil).
I tried the "old" fancy search, what I used (without the possibility to choose tags).
I closed and reopend IMatch each time.
Käse with the old fancy:found 1426 files and 7493 stacked in 1 min 49 sec
the newest fancy:found 1424 files and 7450 stacked in 3 min 20 sec
hinwil with the old fancy:found 135 files and 314 stacked in 1 min 51 sec
the newest fancy:found 135 files and 314 stacked in 3 min 22 sec
That the new fancy found less files in the Käse-run, makes sense, because you restricted the search, if I understood it correct. Seems to me correct.
Now that the new fancy uses far longer for the search, I have no clue, what this could be.
Means in short, for me here was the old search better, because quicker and found for sure all files.
But now comes the fun part:
I used now tags, what works wonderful, see attachement:
Searched the new fancy with these tags:
Käse
found 1488 files and 7142 stacked in 32 sec!
And, without closing IMatch, found the same and also other new search-terms in roughly 4 sec!!!I guess, IMatch holds somehow a list or so, no clue.
But this works not with the search over all, it worked here only with the tag-search, but I tested not very long.
hinwil
found 124 files and 267 in 32 sec
After this search I tried
search for "Berikon OR salt"
found 136 files and 286 stacked in 5 sec!
This means for me, Andy, problem solved! You solved it!
Thanks really a lot. Now, allow me some remarks, what not mean, that you must work on them, only that I mentioned it,
and please, take them really only as rough ideas or remarks, I am happy with that, what you have uploaded now!

- you can see in my attachement, that I cannot see the search-field, I have to scroll down. I could imagine, to put the search-field on top would be a good option (btw: your search in progress - info is very cool).
- I do not know, if this is complicated, if not, it would be nice, that fancy search would remember the last choosen tags. Mostly I think, if we have choosen some tags, we do not change them often, hence they could remain until we want change them again.
- on the left side near "Tags to be searched" is an square-icon, I cannot see, if this is maybe a icon, what is not loaded?
- also no clue, is this complicated: a running time, during the search, would be of course very cool.
- with such a great app and a lot of work, maybe, if you are interested, it would be also nice, somewhere have written your name or so, like "created by Andy ..." I do not know, if this is common or not, but after all, sometimes it is cool to see, who made it.
I can remember, in the past, when I have used a lot of Apps, I did sometimes not know, it this a official App (from Mario) or is it from a user. Hence my "idea".
You made really my day!