feat(updater): clear cached installers after update check

.changeset/afraid-buckets-move.md

@@ -0,0 +1,5 @@
+---
+"electron-updater": patch
+---
+
+feat(updater): clear cached installers after update check

packages/electron-updater/src/AppUpdater.ts

@@ -514,6 +514,12 @@ export abstract class AppUpdater extends (EventEmitter as new () => TypedEmitter
         }).`
       )
       this.emit("update-not-available", updateInfo)
+
+      // remove all installers from cache
+      const downloadedUpdateHelper = await this.getOrCreateDownloadHelper()
+      await downloadedUpdateHelper.clear()
+      this._logger.info(`All installers have been removed from cache: ${downloadedUpdateHelper.cacheDirForPendingUpdate}`)
+
       return {
         isUpdateAvailable: false,
         versionInfo: updateInfo,