If you are searching the OLM file converter into Windows formate then I will suggest you use for OLM to PST converter software which is very helpful to migrate OLM file to Outlook PST format. This tool saves all .olm file into a new file of any of these formats: PST, EML, MSG file format. It can also support all MS Outlook-like: 2003, 2007, 2007, 2011 ,2013 & 2016. Here are some steps you can follow them...
STEP 1: Click on Tools tab, select Export option to export Outlook data to OLM file format.
STEP 2: In the dialog box Export to Archive File (.olm), select the items you want to export (from Mail, Tasks, Calendar, Notes, and Contacts), and click Continue.
Visit here:- Solution to Convert OLM to PST