If you have Revit 2015 installed then you have the default 0.7.5 version of Dynamo. If you then downloaded and installed 0.8.0 and decided that you wanted to go back to using 0.7.5 how do you do it?
A. Go to your user profile folder C:\Users\Username\AppData\Roaming\Dynamo and edit the file you see there called “DynamoDllForLoad_2015.txt”.
There is one line in that file. For using the 0.7.5 version of Dynamo edit it to -
C:\Program Files\Dynamo 0.7\Revit_2015\DynamoRevitDS.dll
OR for using 0.8.0 edit it to -
C:\Program Files\Dynamo 0.8\Revit_2015\DynamoRevitDS.dll
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