Simply delete the old ticket and files using wupclient, than install the old version. PLEASE DON'T DO THIS ON SYSNAND. NO EXPLOITS FOR 5.3.2 BROWSER on 5.5.1 ARE CURRENTLY AVAILABLE. This is more for develepers who want to port things over, since the exploit is more stable on 5.3.2 browser. I can be a tester-5.3.2 browser on 5.5.1 rednand.