Do you want to recover deleted OLM files, then you should use KDETools OLM to Gmail Converter. You can see the preview of the conversion with the help of this tool. You can recover the password protected files with the help of this tool.
With all-in-one CubexSoft OLM Converter tool, the user can simply import Mac OLM data to Gmail account with all emails, notes, tasks, calendars, contacts etc. It can import bulk data from OLM to Gmail in a single conversion process. It is a windows based application, which is compatible to run on all Windows OS platforms like 10, 8.1, 8, 7, etc. To check this program working functionality, then you must try the free trial edition of the tool.
Read More: https://www.cubexsoft.com/olm/