Coreldraw very slow after restarting the program [SOLVED]

Hi folks

Since two days I have a problem with Coreldraw. When I work on a file for about 1-2 hours, then close the program and start it about 15 minutes later to continue working, the program is unbearably slow. I have already deleted all temporary files (app data and win temp). Only when I reboot the pc does the program run again without any problems.

What is the cause of the problem?

My rig:

  • AMD Ryzen 9 7950x 3D
  • 64 GB DDR 5 6400 MHz RAM
  • 3x 2 TB NVME WD Black SNX 850 SSDs Gen4 (4 Lanes)
  • Asus ROG Strix LC GeForce RTX 4090 24GB GDDR6X

Graphics performace prefernce settings I have also made. CPU and graphics card are not overclocked. I have tried both drivers (studio and game).

Coreldraw graphic settings:

Coreldraw version:
CorelDRAW 2021 Update 1 (23.1.0.389)

Thank you in advance.
Greetings Corel Mutt