Desktop App Release v4.39.1
The Desktop App v4.39.1 was released on October 28th, 2026. This release fixes an intermittent issue with NFC readers causing errors.
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Bug Fixes
The following are new bug fixes in the Desktop App. If you find a bug in the Desktop App, submit a bug report.
- In some cases, ACS ACR1552U and ACS ACM1552U readers would enter a state after long encoding sessions where the reader would become unresponsive to tags and report that commands were the incorrect length. The app will now attempt to reset the readers connection in the background in this case.



