How Downgrade from 17.3.1 to the last version

Hey,

how can I downgrade to the last known working version before 17.3.1?

I am having severe issues with 17.3.1 when decoding and delivering videos.
The issues I mentioned in a previous thread are not resolved, but I never had such issues with the previous version like 17.2.

Here is the link to the mentioned thread
viewtopic.php?f=21&t=147599

So, is there a way of downgrading to the last working version, specially since I am not using the free version?

[Peter Chamberlain]

Un install the current and install the previous .

Will that affect the license key in any way or will it just recognize that is was installed?