Provision for Multiple version of COT installtation for smouth migration

Is it possible to have multiple version of COT installed on the computer ? if No then we should like it have multiple version of the COT software for smooth migration

Whenever there is a new release we see that it upgrades the existing version of the Cot software. But we would like to first test on the new version before migration of the software developed. if it is OK then we can discard older version, if any problem is found we can continue with the stable version so that our projects are not suffered, This eliminate the need of reinstalling older version when there are problems in the new release of COT. This is very important when COT is involve in major up gradation of the software .

Request to consider this
Thanking you

With regards
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