Iecutool.com here provides PCMTuner driver, pcmflash application and NET.Framework 4.8 download free.
When do you need these applications?
If pcmtuner gives error “unable to use selected interface j2534”, it can be driver issue.
Delete and reinstall scanmatik driver.
2). If update pcmflash to 1.2.5 by mistake, delete pcmflash 1.2.5, reinstall pcmflash 1.2.0 app above
If you see the error message in 2 images below, please install NET. Framework 4.8