Allow Adobe Flash for certain sites after 2021 EOL announcement

You can still use Adobe Flash as of January 2021 by "whitelisting" certain sites. I mostly use it to manage some old Enterprise Appliances. All you have to do is edit your mms.cfg file, located in:  

C:\Windows\System32\Macromed\Flash 

or

C:\Windows\SysWOW64\Macromed\Flash

So, the file should look be edited as following:

EOLUninstallDisable=1
AutoUpdateDisable=1
EnableAllowList=1
AllowListRootMovieOnly=1
AllowListURLPattern=*://mydomain.example.com

According to the Adobe Flash Admin guide, AllowListUrlPattern syntax is the follwing:

AllowListUrlPattern = <scheme> ://<host>:<port>/<path>
<scheme> = ‘*’ | ‘http’ | ‘https’
<host> = <any char except ‘.’ and ‘*’>
<port> (optional) = <any valid port number>
<path> = ‘/’ <any chars>
 
With EnableAllowList=1 set, administrators can then specify a discrete URL or pattern to allow