After restoring the old "App_Data" folder and importing the old mysql database, the migration/upgrade wizards starts but stops with the following error message (and yes, the database engine for all the tables is InnoDB):
[Management.Settings.frmDatabaseWizard_ErrorExecuting]
Can't DROP 'FK_st_TimeLogs_st_TimeLogCategories'; check that column/key exists
Problem: Can't DROP 'FK_st_TimeLogs_st_TimeLogCategories'; check that column/key exists