VST plugin license lost

hello~
I have bought 4Knob PopD at 2023/4/3. But after some months when I open HALion Sonic again, it tell me not found license about that.
Upgrade Download Manager not working, relogin then upgrade HALion and 4Knob PopD not working.
Any ideas?

… please post your lost license problem to the “Virtual Instruments / HALion Sonic” category.

See you,
Michael.

ok thanks