SUMMARY: The file "FFmpeg.exe" is missing from the setup file of Krita 5.2.0 "krita-x64-5.2.0-setup.exe". The implications of this should be self-explanatory. 

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Based on this report from @Konstrukto: 

https://krita-artists.org/t/krita-5-2-is-released/75820/20?u=michelist 
Quote: 
"I’m not sure if this is connected but on the release client as well as the current version the installation didn’t generate the ffmpeg file for me.
@Michelist kindly provided one for me, so I am covered, however there may be others experiencing this issue
Also good to note because someone may not usually animate, and may discover this later on."

I just unpacked the file "krita-x64-5.2.0-setup.exe" and found that the file "FFmpeg.exe" is missing in the folder "bin". 
In the archive of the portable version, however, the file "FFmpeg.exe" is present in the folder "bin", so there is no need for action with the portable version. 

Since I only work with portable versions of Krita myself, I didn't notice this, and I hadn't investigated the missing of the file "FFmpeg.exe" more deeply during the RC phase, when @Konstrukto reported the same error there. Because of his statement: 

"Unfortunately I can't render my current animations with the old FFmpeg on this krita version ...", 

I thought he had deleted the new FFmpeg while handling the old FFmpeg.
I should have realized this at the time @Konstrukto reported the missing file during the RC phase, that this could not have been the case. 

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Steps to reproduce this: 
Either install the setup version of Krita 5.2.0 and then not find the file "FFmpeg.exe" in the installation subfolder →

"c:\Program Files\Krita (x64)\bin\", 

or extract the file → 

"krita-x64-5.2.0-setup.exe", 

for example, with the software "Universal Extractor", to a folder of your choice and then not find the file "FFmpeg.exe" in the extracted subfolder "bin" of the selected extraction folder. 

Expected result: The file "FFmpeg.exe" would be located in the "krita-x64-5.2.0-setup.exe" and thus could be installed with in the folder "c:\Program Files\Krita (x64)\bin\". 

This affects every version of Windows, so I spare you the data of my computer.
Without knowing your rating criteria, I have set the severity of the error to "Major", please adjust this if necessary.

Regards
Michelist

ADDITIONAL INFORMATION:
Here are the related posts from the Release Candidate topic (just for completeness, there is no special information hidden in them): 

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/95?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/97?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/98?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/99?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/101?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/102?u=michelist

https://krita-artists.org/t/krita-5-2-release-candidate-is-out-please-help-us-in-another-round-of-testing/74137/103?u=michelist