RPA Tool suggestion to automate 32-bit Windows7( or less) desktop applications

Hi everyone,

I need some suggestions from you related to cheapest/free RPA tools to automate a banking system, a tool that allows to automate 32-bit Windows7(or less) desktop applications. I had some solutions like UiPath,SPAExpress but these are very expensive that my client is not ready to use. Please help me and give suggestions that which tool I should use to automate such applications. Thanks in advance