[Affinity designer - Shrinking SHAPE with same aspect ratio problem]

Thank You - this is what i needed  

[Affinity designer - Shrinking SHAPE with same aspect ratio problem]

Expand Stroke makes corners rounded - it is not solving the issue

[Affinity designer - Shrinking SHAPE with same aspect ratio problem]

Welocme, 

 

I want to shrink my shape but when i do it i want it to shrink keeping all sides of shape same way only smlaller - just like shinking selection by few pixels but i cannot achieve this on my shape [ Attached - shapefile ].

As example look on my Basic shape 1 - it has outline fixed as inside - and this gives me effect i want - it's just i need it as second smaller shape 

Than Basic Shape 2 is original shape and Basic Shape 3 - is shrinking using Ctrl+Shit + Corner drag but it does not work as intended. 

Any Hints how can i solve this ? 

 

Thank You alot  

shapefile.afdesign