I tried updating the assistant today as I was prompted from the app. It downloaded the files but reported an error. So I manually downloaded the app from the Steinberg site and installed it. Yet after the install, when I double click or run as an Admin, the app fails to start. Running Windows 10 1903 64 Home. Anyone else experiencing this as well?
Same here, went to get a copy of Groove agent and had to install download assistant now it wont run??? Windows did have an update recently 
Then tryed a elicence update still same issue.
Is it a windows issue??
Same here. After downloading SDA 1.16 yesterday I got a “Signature is corrupt or invalid” message after Edge did a download security scan. The same happens when I download the Cubase 10.0.50 update directly from the Steinberg site. No joy updating directly from SDA 1.15 either. It’s starting to look like a Steinberg issue with their digital signatures.
Thankfully i downloaded the full 10.0.20 install and 10.0.40 update before my other computer died.
Any chime in from Steinberg people for a fix??? My full version of Groove Agent trial will expire before I can even download it at this rate.
Tried reinstalling download assistant from my previous downloads. Wont boot without update? Tried v1.15 & v1.12. Goes to auto update then just hangs. I guess download assistant doesn’t work on Windows 10 anymore.
Hmmmm I can hear crickets among the silence. Is nobody else experiencing this issue?
The Same problem … Download assistant not open
Same here on Win 10. But on Win 7 it works.
Maybe because updates now are only tested with Win 10? 
This is happening to me on both my win10 desktop and win10 laptop. The SDA just won’t launch at all. Tried disabling antivirus and firewall, compatibility settings install/reinstall and it just doesn’t do anything when I click the exe. I just want to download the software I bought but I just can’t get the SDA to work. Very frustrating.
Hi @tonka134, I downloaded it directly from here Downloads | Steinberg. Hope it helps.
Thank you Stefan,
I actually need an installer for Padshop Pro 2. Steinberg Download assistant fails to launch on both my win10 machines.
Hello .I purchased a drum expansion for grove agent 5 .Opened the download assistant .When prompted to enter email and password .A message comes up that I must authorize Steinberg Download Assistant .That I must allow my browser to open it .Has not happened before .There was an update to the assistant .Could not directly download a Trial either .Windows 10 Pro .
Had the same issue. For me the following solution worked: check your computer’s time with an offical time resource. Im my case my PC was 4 minutes late, I updated the computer time and relaunchec SDA, now it worked, don’t asl me why…
It is happening again!
I do not know what is up with Steinberg lately…
I am trying to download groove agent 5 and the site will not load.
funny it says this on an alternative download page
Download faster, more convenient and more reliably using the [Steinberg Download Assistant]