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Windows may warn that the installer is from an unknown publisher because it is new and not yet signed. Choose More info, then Run anyway.

Only do this for the installer you got from the download page or from your trial email. Both link to the same GitHub release.

Open the app and paste the license key from your email. The first activation needs an internet connection. After that the app confirms the license in the background when it is online.

If you cannot find the email, sign in on the account page with the same address and your key is listed there. A trial key can also be resent from the trial page.

A license works on up to three computers at the same time. Install the app on the new computer and paste the same key.

If all three are in use, open Settings on a computer you no longer need and choose Deactivate this computer. If that computer is gone or will not start, email us and we free the slot for you.

The trial runs for 7 days from the first time you activated it. When it ends the app locks and shows a notice. Your saved solves stay on your computer and open again with a full license.

A full license is sold by the year on the pricing page. Buy it, then in the app open Settings, choose Enter a different key and paste the new one. Your saved solves stay. One trial per person and per computer, so a second trial key will not work on the same computer.

It is in the email we sent when you bought the license or started the trial, and on the account page. Sign in there with the address you used and every key tied to it is listed with a copy button.

If you paid with a different address, sign in with that one. If you cannot reach it any more, email us from the address you use now and say which one you paid with.

Sign in on the account page and choose Cancel renewal. The license runs to the end of the paid year and then stops, and nothing more is charged. Resume renewal undoes it any time before then.

Manage billing on the same page opens the Stripe billing portal if you prefer to cancel there, update your card or download an invoice.

The app compares your computer's clock with the last time it confirmed the license. If the clock moved back, it asks you to go online once so the license server can check. Your saved solves are safe.

Connect to the internet and choose Try again. If the clock really is wrong, correct it in the Windows date and time settings first.

Saved solves, your ranges and the license are in %APPDATA%\plo-solver. If you changed the solutions folder in Settings, your solves are there instead. The abstraction cache is in %LOCALAPPDATA%\plo-solver.

Logs are in the logs folder, which Settings can open for you with Open logs folder. The sample ranges are copied to your Documents folder.

Open Settings and choose Report a problem. Describe what happened, leave your email so we can reply, and keep Include diagnostics ticked. That adds the app version, the Windows version, a log excerpt and the settings of the spot you were working on. Ranges are not included.

If the app cannot send, choose Copy report and paste it into an email to us. If the app hit an internal error, it offers to send a report the next time it starts. You can also turn on automatic crash reports in Settings.

The app checks for updates when it starts. When one is ready it shows a banner. Choose Install and it downloads, installs and restarts. Finish any running solve first.

Settings has Check for updates if you want to look sooner. Each version is listed on the changelog page.

Uninstall BERRISolver from Windows Settings under Apps. This removes the app but keeps your saved solves, ranges and license.

To remove everything, also delete %APPDATA%\plo-solver and %LOCALAPPDATA%\plo-solver, and the sample ranges in your Documents folder if you do not want them. Choose Deactivate this computer in Settings first if you want to free the license slot.