After uninstalling avg zen I can not install an older version of avg

Iva, In future please refrain from carrying out multiple topic postings on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. Please see your other posting (https://support.avg.com/answers?id=906b0000000DcwEAAS).
AVG Guru

I uninstalled avg zen using this link: http://aa-download.avg.com/filedir/util/AVG_Remover.exe
But some folders of avg zen are still on my computer and I can not delete them.
I wanted to install older version of avg anti virus using this link: http://files-download.avg.com/inst/mp/AVG_Antivirus_Free_x64_693.exe
I got this message: 0X001F94E: Update cannot proceed due to source/target version mismatch.
I have windows 10.
First question: How to delete folders who remained after uninstall of avg zen
Second question: How to install older version of avg anti virus (compatible with windows 10)
Thanks in advance

Iva, In future please refrain from carrying out multiple topic postings on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. Please see your other posting (https://support.avg.com/answers?id=906b0000000DcwEAAS).
AVG Guru