Affinity Photo v1 does not work on 4k monitor

[sorigrim]

Affinity Photo's user interface does not work on 4k monitor.
On 4K monitor, pulldown menus crash and UI is uncontrollable.
Should Affinity Photo V1 only be used on 2k monitors?
My Affinity Photo version is 1.10.6 for Windows.
Affinity Designer v1  has no user interface issues on 4k monitor.

[debraspicher]

I've always used it fine in 4K.

[Pauls]

Do you have any of the apps listed here installed