Cache file can be found at C:/ Program files/Tradestation 8.2(latest build)/program/cache. I usually just rename it. but you should be able to just delete it without consequence.
I am running the latest TS 8.1 SP1 release - the "forced" upgrade (unbelievable!!!) Anyways, this appears to be stable. I tried TS 8.2 about a month ago and all hell broke loose. Of course, if you need the new TS 8.2 features then that is another story. Still didn't like this "forced" upgrade idea, regardless of the timestamps and daylight savings isues.
It is my understanding that 8.1 will not work after 3/10. Is your version compliant with the new DST change Sunday? el surdo
I'm not sure if that is correct. Guess I'll find out soon. However, 8.1 build 3258 would not log on yesterday, thus from the download page I was able to install 8.1 build 3264 and all seems OK.