https://www.epo.org/en/service-support/faq/myepo-services/online-filing-software/online-filing-sp14/how-do-i-check-thin
How do I check the thin client version?
Navigate to the OLF installation folder (normally C:\Program Files (x86)\EPO_OLF5 for stand-alone installations or C:\Program Files (x86)\EPO_OLF5-TC for client-only installations)
Find the executable OLFClient.exe and right-click on OLFClient.exe
Select Properties, select Details and view the file version
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