I realize that the following is probably a "false positive" problem, but I'm being careful.
I'm currently evaluating both Log4OM and DxLab. I installed Log4OM this evening, downloading it directly from this site. Trend Officescan, my virus scanner identified the installer as possibly malware. I had read here that this sometimes happens with anti-virus software, so I bypassed that. Installed Log4OM, did the basic configuration, created a database in My Documents. I had some trouble getting OmniRig to work. I had to install it manually (even though I'd asked Log4OM's installer to install it), and then had to download the radio ini files to get one for my IC-7300. It still wouldn't talk to the radio. Yes, I was running Log4omUI.exe as administrator. Yes, I know about COM port number, baud rate stop bits, etc. Windows 7 (Professional x64) firewall asked me a couple of times if I wanted to unblock certain things while setting up Communicator, and I said yes, unblock.
Then I was fooling around with the configurations, starting and stopping Communicator, trying to get OmniRig to talk to the radio, when suddenly I got the errors you will see in the attachments. Sorry, I can't tell you exactly what I did when it happened. Officescan terminated Log4OM and actually deleted the Log4OMUI.exe file and its desktop icon. I was pretty shocked, because I had just told Officescan that Log4OM should be trusted to modify files in My Documents, (asking this the first time it tries to write to a file in My Documents, etc. is a part of its anti-ransomware feature).
At which point I have uninstalled Log4OM, am running a full scan on my system overnight, and am going to wait for you kind folks to tell me what's going on. Again, I understand that this is probably a false positive situation. But, after over 30 years as an IT person (now retired), I take such warnings seriously, because I have had to clean up numerous messes caused by people who didn't take such warnings seriously

I must also note that DXLab, while less friendly on the surface than Log4OM, did not give me any such scares, and I was able to get rig control and Fldigi integration working very quickly.
73,
--Peter KD7MW