Hello, I'm the author of WinCatalog, I started to receive complaints that Malwarebytes alerts on the main WinCatalog module since February 20, 2021.
I have installed the latest version of Malwarebytes (it is on a free PRO trial now) and was able to recreate the issue: when I try to start WinCatalog, Malwarebytes reports it contains Malware.AI.461113640 and puts it to quarantine.
I have uploaded WinCatalog.exe to VirusTotal, all 70 engines there, including Malwarebytes, reports the file is safe, here is the report: https://www.virustotal.com/gui/file/1d3cb59271dbd52525446c93247f8d75d