DenisIv

In AP for windows then you export  image (File -Export) the default pop-up window "Export settings" lets you make some fine tuning and then you press [ Export...] button and "Save as..." dialogue with the last used directory opens. 
Some times you need to  save alternative copy of the image at the same location as original.  Some times within dedicated export folder.
So it could be a pain to jump through all the places. 

It would be nice to
1)  have this special dedicated catalog in preferences (or even better in presets) 
2)  let user choose with special switch were to store file :
last used folder save with original (editable file name with auto rename rule and no influence on the last used folder) save within dedicated export folder  Or at least it could be just one more button next to  [ Export...] which will sounds something like [Save with original]

In AP for windows then you export  image (File -Export) the default pop-up window "Export settings" lets you make some fine tuning and then you press [ Export...] button and "Save as..." dialogue with the last used directory opens. 
Some times you need to  save alternative copy of the image at the same location as original.  Some times within dedicated export folder.
So it could be a pain to jump through all the places. 

It would be nice to
1)  have this special dedicated catalog in preferences (or even better in presets) 
2)  let user choose with special switch were to store file :
last used folder save with original (editable file name with auto rename rule and no influence on the last used folder) save within dedicated export folder  Or at least it could be just one more button next to  [ Export...] which will sounds something like [Save with original]

Select the part you want to patch

 
move the mouse pointer to an area to patch it with.
Here it is to the right in the clean glass.

* click twice. That is two clicks, not a double click !

sorted
 
* If you click once, you get a bounding box that lets you fine tune or rotate the patch. Click twice for a simple patch.
 
That might be where you are going wrong. Don't click inside the bounding box with the second click. Photo thinks you are trying to edit the patch, rather than fixing it in place. Click on the good area twice.(or rather, outside the bounding box with the second click).
 
If you click inside the box,to move the patch. Click somewhere outside the box to finalize it.