I've come to hate Windows so I am currently testing FM Pro on Linux Mint 20.2 Uma and WINE 6.0.1.
The installation went well and I was able to do a restore from my Windows FM to the Linux FM. All portfolios, settings, reports, etc., look perfect. However, I have not been able to do a transaction retrieve from Charles Schwab. Schwab has recently changed their download protocols and, while I can successfully retrieve transactions in Windows, the Linux implementation of FM generates an unspecified error. I'm not sure if it has something to do with Linux/WINE or if it's related to Schwab's new security measures.
Internet access through WINE is good and I'm posting this through the Linux FM portal.
If anyone is running FM on a Linux Mint box via WINE, I'd love to hear about how you configured your Linux/WINE.