If you rely on Mastercam X5 for daily production, you are running a risk. A single Windows cumulative update tomorrow could permanently brick your ability to access your toolpaths. The real long-term solution is planning a budget for an upgrade.
Introduction: The Dreaded Pop-Up
Legacy forums like eMastercam.com have dedicated threads for X5. Search for "X5 HASP driver Windows 10" before posting your question.