SDRx Plugin funktioniert in PS Elements 2021 nicht

Is Photoshop Elements 2018 also installed on your D drive?

Maybe uninstall Elements 2021 and make sure you accept the option to delete all preference files.  Reinstall and see what happens.  If the SDRx plugin still doesn't work, install it again.

And, if possible, install Elements 2021 in the default location.

I also have a trial version available in Elements 2021.  So, it may be that there is a registry entry that is looking at the C drive, not the D drive.

Have you purchased the plug-in or are you using a trial version that may have expired?

. . .  After looking at my last screenshot, I see that I apparently had a downloaded a trial copy of the SDRx plug-in.  I checked my Elements 2019 installation and the trial version is available to me:

If you go to Help>System Info . .  and scroll to the bottom of the information, does the plug-in appear under Plug-ins that failed to load?

Did you install the SDRx Plugin on the D drive as well?

If you either installed the SDRx Plugin on C or D drive you could create an Alias (shortcut) of the

SRDx.8bf in C:\Program Files\LaserSoft Imaging\Photoshop SRDx Plug-in

and put the Alias in your PSE 2021 plugins folder

D:\Program Files\Adobe\Photoshop Elements 2021\Plug-Ins

This is probably because you have installed the program on a non-default location - your D drive.  The plug-in installer is probably looking for the plug-in folder on your C drive.  I suggest you contact Silverfast Support.

Have you looked under the Automation Tools menu?

What OS are you using?

Does the plugin show up under the File>Automation Tools menu?

Post moved to Photoshop Elements forum.