Mendeley replaced the desktop software with a new one around 2020 and I must say I regret the switch. It is the worst software experience I have encountered, and that must mean a lot given I used Windows ME and Windows 8.
1. The Word plugin does not sync automatically. You have to restart Word when you download new references.
2. The Software asks for passwords unnecessarily. You have to log in each time you open the app which is so uncharacteristic of desktop software.
3. Files fail to load sometimes.
I have no option but to switch to Zotero. I know it to be good but I chose Mendeley only because it gave free space and it was as good.