Operating system: Windows OS version: Windows 11 (26100.7922) FontBase version: 2026.2.5
What actions caused the issue:
The auto-updater attempted to install version 2026.2.0 but failed due to the certificate change, causing a crash loop on every launch. To resolve this I performed a clean uninstall and reinstalled FontBase, which updated successfully to 2026.2.5. The app now works fine with a fresh AppData folder. However, when I restore my old IndexedDB backup (from before the reinstall), the app crashes immediately with FATAL ERROR app.js and no window appears — only visible in Task Manager.
Current situation:
The app works cleanly without the old database, but my old IndexedDB contains years of manually organized font collections and folders that I cannot recreate. I have confirmed through repeated testing that the crash happens only when the old IndexedDB is present.
Question:
Is there a way to migrate or repair my old IndexedDB so FontBase 2026.2.5 can read it? Happy to share the database file or any additional logs if helpful.
Attached: main.log
[2026-03-07 07:24:37.184] [info] Main process started
[2026-03-07 07:24:38.637] [info] Startup 1431
[2026-03-07 07:25:14.723] [info] Main process started
[2026-03-07 07:25:17.022] [info] Startup 2224
[2026-03-07 07:28:21.133] [info] appExit
[2026-03-07 07:29:53.434] [info] Main process started
[2026-03-07 07:29:55.788] [error] FATAL ERROR app.js { isTrusted: true }
[2026-03-07 07:30:56.488] [info] Main process started
[2026-03-07 07:30:58.775] [error] FATAL ERROR app.js { isTrusted: true }
[2026-03-07 07:32:38.964] [info] Main process started
[2026-03-07 07:32:40.306] [info] Startup 1306
[2026-03-07 07:41:43.930] [info] appExit
[2026-03-07 07:43:35.581] [info] Main process started
[2026-03-07 07:43:38.683] [error] FATAL ERROR app.js { isTrusted: true }
[2026-03-07 07:50:04.770] [info] Main process started
[2026-03-07 07:50:07.355] [error] FATAL ERROR app.js { isTrusted: true }
[2026-03-07 07:51:48.540] [info] Main process started
[2026-03-07 07:51:50.788] [error] FATAL ERROR app.js { isTrusted: true }
[2026-03-07 07:53:44.263] [info] Main process started
[2026-03-07 07:53:46.432] [error] FATAL ERROR app.js { isTrusted: true }
Hello @Dimko, thank you for your post and welcome to the forum
When restoring your app settings by copying over the previously duplicated app settings folder, did you replace the entire C:/Users/USERNAME/AppData/Roaming/FontBase folder or just the IndexedDB folder inside of it?
I only copied back the IndexedDB folder, not the entire FontBase folder. The rest of the AppData\Roaming\FontBase folder (Local Storage, Preferences, etc.) was left as freshly generated by the new install.
Hello @Dimko, thank you for your reply
The entire old folder, yes. Replacing the whole folder, not just the IndexedDB part, as recommended in the settings reset tutorial could help with the current issue.
Hello @yuriy , well settings reset tutorial won.t be needed, because I already reinstalled to the latest version. Seems like the only thing available to me - create all the Collections manually once again.
Hi there,
I was having issues with a previous version of FontBase (can’t remember the version #) not loading, as the icon in the startup bar continually showed ‘starting…’ when I hovered over it. To solve this, I thought it a reasonable idea to manually download and install the latest Windows version 2026.4.1 . The new version now opens as expected, however all my previous collections, folders, watched folders etc. are gone. I can’t express how frustrating this is as I’ve curated these collections over the last 4 years. I don’t believe I changed any of the installation settings from previously, thinking that the database information would simply be picked up from the same folders as before.
Is there any advice as to how I might find and reconnect my old preferences?
Thank you, Dimko. That sounds crazy, considering that the point of keeping a preference file/database is to be able to transfer it into the next generation of product. I will keep investigating because it is a major flaw in a modern computing environment.
All the best, mate~!
