database.\r\norg.h2.jdbc.JdbcSQLException: Database may be already in use: "Locked by another process"

Hello,
The ticket SNAP-1359 you mentioned was created and solved for

Are you on 8.0.3 for s1tbx or also for SNAP Engine & Desktop? (you can check this fast either in Help → About SNAP or in Tools → Plugins → Updates.

Also, some steps to reproduce would help.