Error message when opening Multiterm 2021 after installing SR1 last update

Hello there,

After clicking 3 times in the box, Multiterm opens but I can't do anything.

All Multiterms functions in Studio 2021 SR1 (updated the same day) are also not working, either in new or old projects.

Renaming of folder does not help

Any idea had happened?

Error file:

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<SDLErrorDetails time="09.12.2020 18:48:07">
<ErrorMessage>Retrieving the COM class factory for component with CLSID {834F8355-CEED-4BDF-B034-A66C5757FEF6} failed due to the following error: 8007007e Das angegebene Modul wurde nicht gefunden. (Exception from HRESULT: 0x8007007E).</ErrorMessage>
<Exception>
<Type>System.IO.FileNotFoundException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<FileName />
<FusionLog />
<HelpLink />
<Source>Sdl.MultiTerm.Client.UI</Source>
<HResult>-2147024770</HResult>
<StackTrace><![CDATA[ at Sdl.MultiTerm.Client.UI.Viewer.TermViewer..ctor()]]></StackTrace>
</Exception>
<Environment>
<ProductName>SDL MultiTerm</ProductName>
<ProductVersion>MultiTerm16</ProductVersion>
<EntryAssemblyFileVersion>16.1.1.541</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 10 Pro</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1031</OperatingSystemLanguage>
<CodePage>1252</CodePage>
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX