New release 5.8.3 is not updating already installed tool version 5.8.1

In past ,whenever I updated KTS tool it got updated on same tool instances(till 5.8.1) without any issue… Now for 5.8.3 it is installing just like a new installation and I have two versions. (5.8.1 and 5.8.3). If I try to utilize same workspace for new version , it can not read/import all files and I am missing testcases and other stuffs.