lightroom classice 13.3.1 Windows 11 suddenly very slow in editing

Hi folks, My system has been getting slower and slower over the past 3 weeks and just today my editing slowed to a crawl. I am masking using brush tool and have to wait 10-15 seconds for changes to show up on the screen. Additionally, the cursor gets hung on the brush tool so I can't move sliders until it has finished logging the brushstrokes.

Laptop works fine for all other programs.

I added a Wacom Cintiq to my system about a month ago but other than that have made no changes that I am aware of.

What I have tried:

optimize catalogue set to happen every time I quit LR

cache size increased to 50GB

"synch with LR" is paused

auto-write to XMP is off

laptop scanned for viruses and nothing else is running slow

starting and restarting both laptop and LR

Thanks for any suggestions!

System details:

2x32 GB Ram

2x4TB SSD - operating system and program files on one, images stored on the other.

NVidia (R) GeForce(R) RTX (TM) 4070 with 8GB GDDR6

Lightroom Classic version: 13.3.1 [ 202405311538-6d7c0308 ] (not updating until there is more time for the bugs to get worked out)
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Business Edition
Version: 11.0.22631
Application architecture: x64
System architecture: x64
Logical processor count: 20
Processor speed: 2.9GHz
SqLite Version: 3.36.0
CPU Utilisation: 0.0%
Power Source: Plugged In, 100%
Built-in memory: 65207.0 MB
Dedicated GPU memory used by Lightroom: 0.0MB / 0.0MB (0%)
Real memory available to Lightroom: 65207.0 MB
Real memory used by Lightroom: 6170.6 MB (9.4%)
Virtual memory used by Lightroom: 6875.2 MB
GDI objects count: 908
USER objects count: 2879
Process handles count: 2104
Memory cache size: 1280.3MB
Internal Camera Raw version: 16.3.1 [ 1889 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1884MB / 32603MB (5%)
Camera Raw real memory: 1906MB / 65207MB (2%)

Cache1:
Final1- RAM:226.0MB, VRAM:0.0MB, EL-5659-PS1.psd
Preview2- RAM:22.0MB, VRAM:0.0MB, EL-5657.DNG
Preview3- RAM:22.0MB, VRAM:0.0MB, EL-5661-Edit.tif
Preview4- RAM:22.0MB, VRAM:0.0MB, EL-5659.DNG
Preview5- RAM:22.0MB, VRAM:0.0MB, EL-5653.DNG
Final6- RAM:352.0MB, VRAM:0.0MB, EL-5658.DNG
Preview7- RAM:22.0MB, VRAM:0.0MB, EL-5656.DNG
Preview8- RAM:22.0MB, VRAM:0.0MB, EL-5659-PS2.psd
Final9- RAM:602.0MB, VRAM:0.0MB, EL-5659-Edit.tif
Preview10- RAM:22.0MB, VRAM:0.0MB, EL-5660.DNG
Preview11- RAM:22.0MB, VRAM:0.0MB, EL-5655.DNG
NT- RAM:1356.0MB, VRAM:0.0MB, Combined:1356.0MB

Cache2:
m:1280.3MB, n:982.3MB

U-main: 1956.0MB

System DPI setting: 144 DPI (high DPI mode)
Desktop composition enabled: Yes
Standard Preview Size: 2048 pixels
Displays: 1) 3456x2160, 2) 3840x2160
Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: Yes, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info:

Init State: GPU Unsupported
User Preference: Auto

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: C:\Users\egbl\Lightroom\Catalogues\Lightroom July 2023-v13-3.lrcat
Settings Folder: C:\Users\egbl\AppData\Roaming\Adobe\Lightroom

Installed Plugins:
1) AdobeStock
2) DxO PhotoLab 8
3) DxO PhotoLab 8 Importer
4) Flickr
5) HDR Efex Pro 2
6) Nikon Tether Plugin
7) Show Focus Points
😎 Topaz Photo AI