Can no longer connect to localdb after updating from Sql Server 2016 to 2019

I need to restore a backup for an assignment, but SMSS said I was running v13 while the backup was made in v15. So I downloaded and installed SQL Server Express 2019 and uninstalled the older version. However, SMSS can't connect anymore to (localdb)\MSSQLLocalDB. I read somewhere to add a firewall rule for sqlservr.exe. When I try to run that file manually, it says the SQL Server installation is corrupt. So I ran the Repair from SQL Server Installation Center, everything was okay in the output log but still no luck. I'm pretty clueless, any help is appreciated. The available services: Status | Name | DisplayName ------ | ---- | ----------- Running | MSSQL$SQLEXPRESS | SQL Server (SQLEXPRESS) Stopped | SQLAgent$SQLEXP... | SQL Server Agent (SQLEXPRESS) Stopped | SQLBrowser | SQL Server Browser Running | SQLTELEMETRY$SQ... | SQL Server CEIP service (SQLEXPRESS) Running | SQLWriter | SQL Server VSS Writer The list of LocalDb instances:

-none
PS C:\Program Files\Microsoft SQL Server\150\Tools\Binn> SqlLocalDb.exe i
MSSQLLocalDB

PS C:\Program Files\Microsoft SQL Server\150\Tools\Binn> SqlLocalDb.exe s "MSSQLLocalDB"
Start of LocalDB instance "MSSQLLocalDB" failed because of the following error:
Cannot create an automatic instance. See the Windows Application event log for error details.

Event viewer details: > LocalDB parent instance version is invalid: MSSQL13E.LOCALDB