I have been trying to launch affinity photo and designer for the last 3 months, trying all the different tricks others have used, such as changing colour profile in colour management, dotnet fix tool, etc. I had both applications working on version 1.9.2 when I first bought the product, So I thought trying to reinstall those versions would be my safest bet.
I've checked my %temp% and found the startup logs, I hope this can be of use:
+Startup: 23/05/2022 6:02:28 PM
+OS version: 10.0.19044
+ProductName: Designer
+ProductType: Retail
+Opening HKLM...
+ OK
+Opening registry key: 'SOFTWARE\Serif\Affinity\Designer\1'...
+ OK
+Reading registry data...
+ Designer Install Path: [not found]
+ Designer Desktop shortcut: 1
+Getting ProgramW6432 environment variable...
+ OK
+Install path not found, using default: C:\Program Files\Affinity\Designer
+Opening MSI database: Affinity.msi
+Opening database view: SELECT `Value` FROM `Property` WHERE `Property`='ProductVersion'
+ OK
+MsiViewExecute
+ OK
+MsiViewFetch
+ OK
+MsiRecordGetString
+ Value: 1.9.2.1035
+Opening database view: SELECT `Value` FROM `Property` WHERE `Property`='ProductCode'
+ OK
+MsiViewExecute
+ OK
+MsiViewFetch
+ OK
+MsiRecordGetString
+ Value: {97E38C19-DA5D-448B-9840-38646582331F}
+Install state: -1
+ IsThisVersionInstalled: False
+Opening database view: SELECT `Value` FROM `Property` WHERE `Property`='UpgradeCode'
+ OK
+MsiViewExecute
+ OK
+MsiViewFetch
+ OK
+MsiRecordGetString
+ Value: {8D334CF3-2FB7-40EA-A68E-5891CDAD8F53}
+MsiEnumRelatedProducts: 259
+ IsAnyVersionInstalled: False
+ProductCode: {97E38C19-DA5D-448B-9840-38646582331F}
+ProductVersion: 1.9.2
+InstallType: Normal
+Initialising main window...
+ OK
+Main window loaded
+Checking requirements...
+ OK
+DotNetInstall: checking installed version
+ Found 528372
+Switching to page: Install