Download StreamXLS
- Publisher
- StreamXLS LLC
- Signature
- Authenticode
- Target
- Windows 10 / 11 · Microsoft Excel (32- or 64-bit)
- Install
- Per-user, no administrator rights required
Free 30-day trial starts on first use — no card, no sign-up. Purchase a license whenever you're ready.
One installer for both 32-bit and 64-bit Excel. It's signed by StreamXLS LLC, and below we show you how to confirm that for yourself before you run it.
Why Windows may flag a signed download
The installer is signed by StreamXLS LLC. Even so, the first people to download a new release may see Microsoft Defender SmartScreen warn that it "prevented an unrecognized app from starting" or that the file "isn't commonly downloaded." These are not virus warnings.
Microsoft SmartScreen weighs how many times Windows has already seen a given file and publisher. A signed file from a new publisher is treated cautiously until the publisher has built a large install base. The warnings are Microsoft telling you that StreamXLS is new — not that the company or its apps are unsafe. As more people install StreamXLS, these warnings will stop appearing. Until then, here is exactly how to proceed, and how to confirm the file really came from us.
Edge runs the same reputation check at download time, so it may hold the file rather than saving it — the panel above. To keep the file:
- Open the Downloads list (Ctrl+J), and on the held file click ⋯ More actions → Keep.
- On the "Make sure you trust…" panel above, choose Keep anyway — it sits behind the arrow (⌄) on the Delete button. You'll verify the publisher in the next step, before running it.
- Click More info on that dialog. SmartScreen then reveals the App and Publisher lines shown above, plus a Run anyway button.
- Check the Publisher line. It shows our certificate's full identity — US, Washington, Spokane, StreamXLS LLC, StreamXLS LLC (the name appears twice because it is both the organization and the certificate name). If it names any other company, stop and don't run it.
- Click Run anyway to continue the install.
If you'd rather confirm the file before you open it at all, verify the signature and checksum first — the next section shows how.
Confirm it came from us
Two independent checks let you confirm the installer is the exact file we published.
1 · Check the digital signature
Right-click the downloaded installer (StreamXLS-Setup-<version>.exe) and choose Properties. Open the Digital Signatures tab, select the signature in the list, and click Details. The signer's name should read StreamXLS LLC, and the certificate should report that it is valid. If the Digital Signatures tab is missing, or the name is anything other than StreamXLS LLC, don't run the file — email us instead.
2 · Match the SHA-256 checksum
Each release publishes a SHA-256 checksum for its installer. In PowerShell, run this against the file you downloaded (using its exact name):
Get-FileHash .\StreamXLS-Setup-1.0.0.exe
Compare the result against the published value for that release — if they match, you have a valid copy.
The checksum for each build is listed with that release's download, so you can match it against the file in hand.
From installed to streaming
The 30-day, full-featured trial starts automatically the first time StreamXLS is used in Excel — no key, no signup, nothing to configure. Because the install is per-user, there's no UAC prompt and no machine-wide change.
Open the StreamXLS Control Panel from the Start menu to see your license status, TWS API status, and settings — it's the first place to look when something isn't behaving. Once you've purchased a license: your license key arrives by email. Paste it into the StreamXLS Control Panel and click Activate. Your workbooks keep running unchanged.