Meshmixer worked well, but began to slow down

[makiroy23]

My computer system

NVIDIA GeForce GTX 1650
Processor Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz 2.30 GHz
RAM 32.0 GB (Available: 31.9 GB)
System type 64-bit operating system, x64 processor
SSD 1TB

Meshmixer 3.5 latest version

I started working with Meshmixer and had very good processing speed from the very beginning. 3 days have passed and the models take longer to load (when you open the program, the models take longer to load by 30-40%). The model is the same size of 60 megabytes. All editing actions also take longer to load (for example, sculpting) and the processing process itself has become more complicated. Even saving the file has become longer. Task Manager does not show critical loads. And for example, I need to put the number 2 on a model weighing 30 megabytes, which is located by default in the Meshmixer directory and my system is so slow that it is impossible to process the model

Thanks for any hints and help