Getting an error code when trying to install version 9

1

MailClient.Storage.Data.DatabaseHasNewerVersionException: Data file ‘C:\Users\mikes\AppData\Roaming\eM Client/C:\Users\mikes\AppData\Roaming\eM Client\Archive/folders.dat’ has version 10 but only versions up to 8 are supported
at MailClient.Storage.Data.DbRepository1.ThrowIfNewerVersionThanSupported(Int32 dbVersion, String databaseName) at MailClient.Storage.Data.DbRepository1.CheckSchema(String databaseName, String resourceName)
at MailClient.Storage.Data.DbRepository1..ctor(DataStore dataStore, String location, String indexTable, SingleFileDatabaseContext singleFileDatabaseContext, String[] readWriteDatabaseNames, String[] readOnlyDatabaseNames, Boolean skipSchemaCheck) at MailClient.Storage.Data.DbFolderRepository..ctor(DataStore dataStore, String dbLocation, SingleFileDatabaseContext singleFileDatabaseContext) at MailClient.Accounts.ItemRepositories.Open(DataStore dataStore, String accountPath, AccountType accountType, String singleFileDatabaseName) at MailClient.Accounts.ItemRepositories..ctor(DataStore dataStore, String accountPath, AccountType accountType, String accountName, String protocolName) at MailClient.DbRepair.ConsistencyChecker.CheckConsistencyForAccount(String accountDirectory, RepairMode mode, CancellationToken token) at MailClient.DbRepair.ConsistencyChecker.<>c__DisplayClass2_0.<Check>b__0(String p) at MailClient.DbRepair.PerAccountExecutor.Execute(String dataStoreLocation, Func2 action)
at MailClient.DbRepair.ConsistencyChecker.Check(RepairMode mode, CancellationToken token)
at MailClient.DbRepair.CheckingProcess.Check(CancellationToken token)
Data:
AccountType: Mail
DatabaseLocation: C:\Users\mikes\AppData\Roaming\eM Client\Archive

2

This happens when the database has been used by one version of eM Client, then you try to use it with an older version. It is not backwards compatible.

You will need to install the latest version again from here: https://www.emclient.com/dist/latest/setup.msi

Then, if you want to revert to an older version, follow the downgrade instructions here: How can I downgrade back to eM Client 9, eM Client 8 or older? - Powered by Kayako Help Desk Software.