I rolled back to 2.2.4 to test. The first two images below show it working. First image is settings on exit from first call to DeNoise. Then I went right back in, using the ‘last filter’ option. Second image is the settings on re-entry. Sliders match. Working as expected.
Then I reinstalled 2.2.7 (in this case, though behavior continues in 2.2.9). Same procedure, but you can see that the noise and sharpen sliders are back to default settings on renetry. Not shown in the shots is that the color denoise slider (if I had used it for this test), does retain its settings when DeNoise is reopened.
System info below:
Application & Version: Topaz DeNoise AI Version 2.2.9
Operating System: Windows 10 (10.0)
Graphics Hardware: GeForce GTX 1080 Ti/PCIe/SSE2
OpenGL Driver: 3.3.0 NVIDIA 452.06
CPU RAM: 32701 MB
Video RAM: 11264 MB
Preview Limit: 7895 Pixels
Not working shots: