Mailwasher Pro blocked by AVG Free

I think it started a week or two ago. I was pretty busy with other things and didn't investigate it for a while. The Mailwasher forum had an old entry where soneone found the problem was caused by their antivirus. So I turned AVG off and it worked. It was a few more days until I had time to start this thread. I seem to recall it did start after I had to reboot because AVG had updated.
Anyway it's working fine now, and Mailwasher gets rid of most of my spam, and I never open email from some ridiculous sender (such as an income tax alert from qwertyuiop@wyzz.com).

Hello John,

Please accept our apologies for the inconvenience this has caused you.
Could you let us know whether you're using AVG Internet Security (Paid) or AVG Antivirus Free?
If you're using using AVG Antivirus Free, please repair it as mentioned in this article, restart your computer once & check if the issue persists.
Keep us updated.

I have Windows 10. I use Mailwasher Pro to block spam. It accesses gmail by imap. It has worked with AVG for years until the last week or two. Thunderbird is my email program and it works fine, using pop3 to access gmail. Turning off AVG lets Mailwasher work. Is there any setting in AVG I can check?

Spent a couple of hours with the remote tech. Ended up creating exception for Mailwasher. Now it's up to your programmers to get rid of the false positive.

Software version        22.8.3250 (build 22.8.7500.439)

Hello John,
Thank you for replying.
Are you saying your issue has been resolved?
Thank you and keep us updated.

Glad to know that, John. Please let us know the version of AVG that is installed on your computer (Open AVG - Menu - About).

Thank you for sharing the details, John.
We have sent you an email asking you to connect with our AVG free remote technician in order to check and resolve it. 
You can also reply to that email for further assistance.
Thank you.

Thank you for connecting to the remote support. Have you submitted false positive to AVG? If yes, you can relax, we will take care of the same. Once our team analyze the file, it will be added to global exception list and a update will be released for the same.

Spent a couple of hours with the remote tech. Ended up creating exception for Mailwasher. Now it's up to your programmers to get rid of the false positive.

I use AVG Free. I followed the instructions in the article, although I had to go to the Uninstall screen of Programs and Setting to do it. No change.

Please disable 'Scan for incoming email' in email shield settings to check if it helps, John. (Open AVG - Menu - Settings - Basic protection - Email shield - Disable scan for incoming emails or outgoing emails).

Hello John,
Thank you for replyin.
Could you please confirm the last update?
We will check and help you out.
Thank you and keep us updated.

Hello John,

Please accept our apologies for the inconvenience this has caused you.
Could you let us know whether you're using AVG Internet Security (Paid) or AVG Antivirus Free?
If you're using using AVG Antivirus Free, please repair it as mentioned in this article, restart your computer once & check if the issue persists.
Keep us updated.

I wouldn't say it's been resolved, just a work-around found.
I had been using McAfee anti-virus since DOS 2 back in the 80's. Then one update had problems and I switched to AVG Free. I installed it but never interacted with it, It would occasionally quarantine something I downloaded, then I would just delete whatever I had downloaded. This set-and-forget was fine. Then when Mailwasher stopped working I thought it was the problem. Fortunately there was a 3-year-old similar problem on the Mailwasher forum where the problem had been traced to Avast anti-virus. So I turned off AVG Free and Mailwasher worked. At first I thought it might be the firewall but turning that off didn't help. So I got on this support site and set Thunderbird to check my mail and left Mailwasher off. I had never explored AVG much and was too busy to play with it last week. Now I am back to having time on my hands (I'm retired) and can dig into problems like this. AVG will detect a problem with files I download so I'm not sure the email shield is really needed. I'll just leave it off and go back to set-and-forget with AVG. Now your programmers can have 'fun' looking for the bug (I used to do some programming and have memories of bugs driving me crazy for weeks).
Cheers