If You activate 14 you loose licience of 15 .Same other way around.
Thus activating 15 means you have to pay extra for plugins you have in Version 14.
Because 14 nolonger licienced.
Cannot repro on my two systems where both Vegas Pro 14 and Vegas Pro 15 are installed and used.
When install My Vegas 15 Suite and try to run 14 Pro wven when I close 15 I get error -53 licence meggage when In install The upgrade that makes it impossible the use the stablizer from prodad that is licenced.I even log into my account to deactivate and reinstall and reverse happens when reinstall Vegas Pro 14.I am not Exceding my activations I have 2 seperate Serial Numbers..
Is this a post about VEGAS Pro activation or about compatibility of 3rd party plugins?
Please stick to one topic per post.
If you are referring to Mercalli, there is a thread for that already and that topic has been heavily discussed. Unfortunately, the license for that third party plugin does not carry over to the new version of Vegas, and that is on the third party developer, not Magix.