Same scenario on my ‘mini-tower’. Newer DELL Inspiron 3668 with Windows 10 Home (64x), OS build: 17134.228; Version: 1803. The pc came with McAfee LiveSafe pre-installed.
Months ago I un-installed McAfee, updated Windows Defender, and verified an exception in the firewall to allow “Fritzing.exe” to accept inbound and outbound activity.
If memory serves me correctly, there was no issues with ‘fritzing’. However, a OS reset was needed to dismiss the discrepencies from un-installing McAfee.
Question: Is there a link on ‘fritzing’s’ website where someone can download the parts library update(s)?