There is nothing that I am aware of that does this.
You could print the PureEdge form to PDF then import that PDF into Designer. That will not do 100% of what you want but it will at least get you started (it will give you the look anyways).
There is an import option on the file open dialog that will read XForms and convert them to PDF but that is only part of the solution with PureEdge as those are not pure Xforms (to my understanding anyways). Only the XFroms components will be imported.
I've managed to upgrade my test PureEdge form to a Lotus Form and then import it using LC Designer 8.1.2. Problem is that Designer throws an error when importing. I have a log file, here's the exception.... The prolog follows as well.<br /><br />141 [main] ERROR - class com.adobe.convertxf.xforms.XFormsDocumentthrew SAXException while creating DOM document:<br />org.xml.sax.SAXParseException: Content is not allowed in prolog.<br /> at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)<br /> at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)<br /> at com.adobe.convertxf.util.DOMUtility.parseDocumentFromString(Unknown Source)<br /> at com.adobe.convertxf.xforms.XFormsDocument.startConversion(Unknown Source)<br /> at com.adobe.convertxf.xforms.XFormsProcessor.readForm(Unknown Source)<br /> at com.adobe.convertxf.xforms.XFormsProcessor.main(Unknown Source)<br /> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br /> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)<br /> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)<br /> at java.lang.reflect.Method.invoke(Unknown Source)<br /> at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)<br /> at com.exe4j.runtime.WinLauncher.main(Unknown Source)<br />141 [main] ERROR - XFormsException caught during conversion. Terminating...<br />com.adobe.convertxf.xforms.XFormsException: SAX Exception caught while creating DOM document: org.xml.sax.SAXParseException: Content is not allowed in prolog.<br /> at com.adobe.convertxf.xforms.XFormsDocument.startConversion(Unknown Source)<br /> at com.adobe.convertxf.xforms.XFormsProcessor.readForm(Unknown Source)<br /> at com.adobe.convertxf.xforms.XFormsProcessor.main(Unknown Source)<br /> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br /> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)<br /> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)<br /> at java.lang.reflect.Method.invoke(Unknown Source)<br /> at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)<br /> at com.exe4j.runtime.WinLauncher.main(Unknown Source)<br /><br />I'm not too sure what "Content is not allowed in prolog". But here's the prolog that I have.<br /><br /><?xml version="1.0" encoding="UTF-8"?><br /><XFDL xmlns:custom="http://www.ibm.com/xmlns/prod/XFDL/Custom" xmlns:designer="http://www.ibm.com/xmlns/prod/workplace/forms/designer/2.6" xmlns:xfdl="http://www.ibm.com/xmlns/prod/XFDL/7.6" xmlns="http://www.ibm.com/xmlns/prod/XFDL/7.6"><br /><br />Can you see something that would cause complaints?<br /><br />Thanks!!