It addressed minor stability issues common in the v0.9 early access branch.
You will need a program like 7-Zip or WinRAR to open it. Soulstone.Survivors.v0.9.028e.rar
If you have a file named Soulstone.Survivors.v0.9.028e.rar , you are likely dealing with a compressed archive of that specific historical version. It addressed minor stability issues common in the v0
Are you trying to from this old version, or Update v0.9.028e: Steam Achievements and general fixes! Soulstone.Survivors.v0.9.028e.rar
The primary goal of this patch was to ensure players correctly received Steam achievements for tasks they had already completed in-game.