Jon1

Latest Beta works just fine , thanks.

Not yet , only in the Mac version.

Yesterday I tried to make some ajustments using affinity but unfortunately I wasn't able to get it right. There are two missing features. There isn't something like an eyedropper for selecting the color. Sometimes PS considers something as yellow when it looks green for instance. But much more importantly, there isn't any way to change the range of the color it's trying to affect. This is crucial for a lot of HSL ajustments. A lot of apps do offer the ability to adjust the HSL range. Now you can adjust only parts of an autumn leave for instance, the red channel doesn't cover everything and the yellow channel covers other things too so it's just not possible. 
Maybe you can work around this issue by using something like color range, but that limits your options to only one color and it's more work and less flexible. 
Please refer to the attached screenshot to see what I mean. 

Make a selection of the lighter building at the back using the Brush Selection Tool (W) use a smallish size  Now select the Picker Tool (I) and use Radius: 129x129 Click on the large gable end wall to select sample colour Create a new Pixel Layer and change the blend mode to Soft Light and adjust the Opacity to about 70% Now switch to the Flood Fill Tool (G) and click anywhere in the selection you made in step one. You should have a very close match to the colour of the rest of the buildings.

Hi,
Make a careful selection of the walls of the background buildings, leaving out the windows, road signs etc (my selection is fairly rough but gives you an idea of what you might achieve with more care and time.)
Now add a Recolour Adjustment. My settings are below - it's quite desaturated, and I've set the blend mode to Lighter Colour.

 
It's open to experimentation...

This forum is  not "the right place" and it goes against the guidelines a bit, but we do encourage honest discussion and comparisons so we tend to overlook some gushing about other people's apps, unlike some other forums.
 
However  this is a beta thread, and this is certainly not the right place for any more non-beta discussions 

Hi @Jon1
 
I noticed that in both your screenshots, your Background layer is locked (indicated by the lock icon in the Layers panel). This means you cannot select it by clicking on it in the canvas, although of course you can by clicking on it in the Layers panel. To unlock the layer, click on the lock icon in the Layers panel.
 
The layer probably was locked because this is the default, but if you want you can change that in the Preferences: