I installed the TI 11 trial. Later I wanted to return to TI 10 but discovered that TI 11 had overwritten much of it. Uninstalling TI 11 did not succeed and reinstalling TI 10 failed also. Nothing I tried, Repair or Remove worked for TI. I uninstalled DD 10 as well and then deleted all Acronis files and every registry entry containing "acronis". I could then reinstall, or so I thought, TI 10. Although the installation seemed to complete OK, I cannot get TI 10 to start from either the icon or the .exe file. I have uninstalled and reinstalled several times with no change. Repair completes also but fixes nothing. What can I try now?